21122120102 has 16 divisors (see below), whose sum is σ = 32061150000. Its totient is φ = 10435490400.

The previous prime is 21122120077. The next prime is 21122120119. The reversal of 21122120102 is 20102122112.

It is a super-2 number, since 2×21122120102² (a number of 21 digits) contains 22 as substring.

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, 3977 + ... + 205572.

It is an arithmetic number, because the mean of its divisors is an integer number (2003821875).

Almost surely, 2^21122120102 is an apocalyptic number.

21122120102 is a deficient number, since it is larger than the sum of its proper divisors (10939029898).

21122120102 is a wasteful number, since it uses less digits than its factorization.

21122120102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210151.

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

Adding to 21122120102 its reverse (20102122112), we get a palindrome (41224242214).

The spelling of 21122120102 in words is "twenty-one billion, one hundred twenty-two million, one hundred twenty thousand, one hundred two".