202123213100 has 36 divisors (see below), whose sum is σ = 439394939424. Its totient is φ = 80704111680.

The previous prime is 202123213087. The next prime is 202123213109. The reversal of 202123213100 is 1312321202.

It is a super-2 number, since 2×202123213100² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (202123213109) 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 11 ways as a sum of consecutive naturals, for example, 1758692 + ... + 1870091.

It is an arithmetic number, because the mean of its divisors is an integer number (12205414984).

Almost surely, 2^202123213100 is an apocalyptic number.

202123213100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202123213100 is an abundant number, since it is smaller than the sum of its proper divisors (237271726324).

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

202123213100 is a wasteful number, since it uses less digits than its factorization.

202123213100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3629354 (or 3629347 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 202123213100 its reverse (1312321202), we get a palindrome (203435534302).

The spelling of 202123213100 in words is "two hundred two billion, one hundred twenty-three million, two hundred thirteen thousand, one hundred".