21012012221110 has 32 divisors (see below), whose sum is σ = 38034788867712. Its totient is φ = 8357444749440.

The previous prime is 21012012221107. The next prime is 21012012221143. The reversal of 21012012221110 is 1112221021012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15838792 + ... + 17114068.

It is an arithmetic number, because the mean of its divisors is an integer number (1188587152116).

Almost surely, 2^{21012012221110} is an apocalyptic number.

21012012221110 is a deficient number, since it is larger than the sum of its proper divisors (17022776646602).

21012012221110 is a wasteful number, since it uses less digits than its factorization.

21012012221110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284568.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21012012221110 its reverse (1112221021012), we get a palindrome (22124233242122).

The spelling of 21012012221110 in words is "twenty-one trillion, twelve billion, twelve million, two hundred twenty-one thousand, one hundred ten".