1211110002 has 16 divisors (see below), whose sum is σ = 2691355680. Its totient is φ = 403703316.

The previous prime is 1211109997. The next prime is 1211110013. The reversal of 1211110002 is 2000111121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11213928 + ... + 11214035.

It is an arithmetic number, because the mean of its divisors is an integer number (168209730).

Almost surely, 2^1211110002 is an apocalyptic number.

1211110002 is an abundant number, since it is smaller than the sum of its proper divisors (1480245678).

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

1211110002 is a wasteful number, since it uses less digits than its factorization.

1211110002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22427974 (or 22427968 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1211110002 is about 34801.0057613282. The cubic root of 1211110002 is about 1065.9279830775.

Adding to 1211110002 its reverse (2000111121), we get a palindrome (3211221123).

The spelling of 1211110002 in words is "one billion, two hundred eleven million, one hundred ten thousand, two".