210122100020 has 48 divisors (see below), whose sum is σ = 504340421760. Its totient is φ = 72035094144.

The previous prime is 210122100007. The next prime is 210122100031. The reversal of 210122100020 is 20001221012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 210122099974 and 210122100010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1558871 + ... + 1688289.

It is an arithmetic number, because the mean of its divisors is an integer number (10507092120).

Almost surely, 2^210122100020 is an apocalyptic number.

210122100020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210122100020 is an abundant number, since it is smaller than the sum of its proper divisors (294218321740).

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

210122100020 is a wasteful number, since it uses less digits than its factorization.

210122100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141032 (or 141030 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 210122100020 its reverse (20001221012), we get a palindrome (230123321032).

The spelling of 210122100020 in words is "two hundred ten billion, one hundred twenty-two million, one hundred thousand, twenty".