21103210122 has 24 divisors (see below), whose sum is σ = 43260973728. Its totient is φ = 6862829280.

The previous prime is 21103210097. The next prime is 21103210133. The reversal of 21103210122 is 22101230112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1036078 + ... + 1056249.

It is an arithmetic number, because the mean of its divisors is an integer number (1802540572).

Almost surely, 2^21103210122 is an apocalyptic number.

21103210122 is an abundant number, since it is smaller than the sum of its proper divisors (22157763606).

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

21103210122 is a wasteful number, since it uses less digits than its factorization.

21103210122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2092414 (or 2092373 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21103210122 its reverse (22101230112), we get a palindrome (43204440234).

The spelling of 21103210122 in words is "twenty-one billion, one hundred three million, two hundred ten thousand, one hundred twenty-two".