21020122102 has 8 divisors (see below), whose sum is σ = 36034495056. Its totient is φ = 9008623752.

The previous prime is 21020122093. The next prime is 21020122129. The reversal of 21020122102 is 20122102012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 750718633 + ... + 750718660.

It is an arithmetic number, because the mean of its divisors is an integer number (4504311882).

Almost surely, 2^21020122102 is an apocalyptic number.

21020122102 is a deficient number, since it is larger than the sum of its proper divisors (15014372954).

21020122102 is a wasteful number, since it uses less digits than its factorization.

21020122102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501437302.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21020122102 its reverse (20122102012), we get a palindrome (41142224114).

The spelling of 21020122102 in words is "twenty-one billion, twenty million, one hundred twenty-two thousand, one hundred two".