21020220110102 has 8 divisors (see below), whose sum is σ = 31532681285112. Its totient is φ = 10509326348400.

The previous prime is 21020220110039. The next prime is 21020220110137. The reversal of 21020220110102 is 20101102202012.

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

It is a super-3 number, since 3×21020220110102³ (a number of 41 digits) contains 333 as substring.

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, 391819799 + ... + 391873442.

It is an arithmetic number, because the mean of its divisors is an integer number (3941585160639).

Almost surely, 2^{21020220110102} is an apocalyptic number.

21020220110102 is a deficient number, since it is larger than the sum of its proper divisors (10512461175010).

21020220110102 is a wasteful number, since it uses less digits than its factorization.

21020220110102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783706654.

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

Adding to 21020220110102 its reverse (20101102202012), we get a palindrome (41121322312114).

The spelling of 21020220110102 in words is "twenty-one trillion, twenty billion, two hundred twenty million, one hundred ten thousand, one hundred two".