2122122021 has 16 divisors (see below), whose sum is σ = 2886358464. Its totient is φ = 1386532224.

The previous prime is 2122122017. The next prime is 2122122031. The reversal of 2122122021 is 1202212212.

It is not a de Polignac number, because 2122122021 - 2² = 2122122017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122122031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12801 + ... + 66393.

It is an arithmetic number, because the mean of its divisors is an integer number (180397404).

Almost surely, 2^2122122021 is an apocalyptic number.

It is an amenable number.

2122122021 is a deficient number, since it is larger than the sum of its proper divisors (764236443).

2122122021 is a wasteful number, since it uses less digits than its factorization.

2122122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53860.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 2122122021 is about 46066.4956448827. The cubic root of 2122122021 is about 1285.0601335493.

Adding to 2122122021 its reverse (1202212212), we get a palindrome (3324334233).

The spelling of 2122122021 in words is "two billion, one hundred twenty-two million, one hundred twenty-two thousand, twenty-one".