21121012012210 has 16 divisors (see below), whose sum is σ = 41473987224192. Its totient is φ = 7680368004400.

The previous prime is 21121012012181. The next prime is 21121012012223. The reversal of 21121012012210 is 1221021012112.

It is a super-2 number, since 2×21121012012210² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96004599946 + ... + 96004600165.

It is an arithmetic number, because the mean of its divisors is an integer number (2592124201512).

Almost surely, 2^{21121012012210} is an apocalyptic number.

21121012012210 is a deficient number, since it is larger than the sum of its proper divisors (20352975211982).

21121012012210 is a wasteful number, since it uses less digits than its factorization.

21121012012210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192009200129.

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

Adding to 21121012012210 its reverse (1221021012112), we get a palindrome (22342033024322).

The spelling of 21121012012210 in words is "twenty-one trillion, one hundred twenty-one billion, twelve million, twelve thousand, two hundred ten".