202121100122 has 16 divisors (see below), whose sum is σ = 324547711200. Its totient is φ = 94118834160.

The previous prime is 202121100101. The next prime is 202121100127. The reversal of 202121100122 is 221001121202.

It is a super-2 number, since 2×202121100122² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 202121100097 and 202121100106.

It is not an unprimeable number, because it can be changed into a prime (202121100127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45073829 + ... + 45078312.

It is an arithmetic number, because the mean of its divisors is an integer number (20284231950).

Almost surely, 2^202121100122 is an apocalyptic number.

202121100122 is a deficient number, since it is larger than the sum of its proper divisors (122426611078).

202121100122 is a wasteful number, since it uses less digits than its factorization.

202121100122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90152221.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 202121100122 its reverse (221001121202), we get a palindrome (423122221324).

The spelling of 202121100122 in words is "two hundred two billion, one hundred twenty-one million, one hundred thousand, one hundred twenty-two".