21002020122110 has 16 divisors (see below), whose sum is σ = 37960497785232. Its totient is φ = 8365949923200.

The previous prime is 21002020122107. The next prime is 21002020122133. The reversal of 21002020122110 is 1122102020012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4357263176 + ... + 4357267995.

It is an arithmetic number, because the mean of its divisors is an integer number (2372531111577).

Almost surely, 2^{21002020122110} is an apocalyptic number.

21002020122110 is a deficient number, since it is larger than the sum of its proper divisors (16958477663122).

21002020122110 is a wasteful number, since it uses less digits than its factorization.

21002020122110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8714531419.

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

Adding to 21002020122110 its reverse (1122102020012), we get a palindrome (22124122142122).

The spelling of 21002020122110 in words is "twenty-one trillion, two billion, twenty million, one hundred twenty-two thousand, one hundred ten".