2121213000 has 64 divisors (see below), whose sum is σ = 6618193920. Its totient is φ = 565656000.

The previous prime is 2121212993. The next prime is 2121213007. The reversal of 2121213000 is 3121212.

2121213000 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2121212993) and next prime (2121213007).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (2121213007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 350536 + ... + 356535.

It is an arithmetic number, because the mean of its divisors is an integer number (103409280).

Almost surely, 2^2121213000 is an apocalyptic number.

2121213000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121213000 is an abundant number, since it is smaller than the sum of its proper divisors (4496980920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121213000 is a wasteful number, since it uses less digits than its factorization.

2121213000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707095 (or 707081 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 2121213000 is about 46056.6281874824. The cubic root of 2121213000 is about 1284.8766201494.

Adding to 2121213000 its reverse (3121212), we get a palindrome (2124334212).

The spelling of 2121213000 in words is "two billion, one hundred twenty-one million, two hundred thirteen thousand".