21023122102 has 16 divisors (see below), whose sum is σ = 32200029072. Its totient is φ = 10291881600.

The previous prime is 21023122079. The next prime is 21023122121. The reversal of 21023122102 is 20122132012.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 505524 + ... + 545527.

It is an arithmetic number, because the mean of its divisors is an integer number (2012501817).

Almost surely, 2^21023122102 is an apocalyptic number.

21023122102 is a deficient number, since it is larger than the sum of its proper divisors (11176906970).

21023122102 is a wasteful number, since it uses less digits than its factorization.

21023122102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051263.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21023122102 its reverse (20122132012), we get a palindrome (41145254114).

The spelling of 21023122102 in words is "twenty-one billion, twenty-three million, one hundred twenty-two thousand, one hundred two".