21022121102 has 16 divisors (see below), whose sum is σ = 31701571440. Its totient is φ = 10455080832.

The previous prime is 21022121077. The next prime is 21022121119. The reversal of 21022121102 is 20112122012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245558 + ... + 319910.

It is an arithmetic number, because the mean of its divisors is an integer number (1981348215).

Almost surely, 2^21022121102 is an apocalyptic number.

21022121102 is a deficient number, since it is larger than the sum of its proper divisors (10679450338).

21022121102 is a wasteful number, since it uses less digits than its factorization.

21022121102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75107.

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

Adding to 21022121102 its reverse (20112122012), we get a palindrome (41134243114).

The spelling of 21022121102 in words is "twenty-one billion, twenty-two million, one hundred twenty-one thousand, one hundred two".