20121010021211 has 16 divisors (see below), whose sum is σ = 22259638999296. Its totient is φ = 18033962100000.

The previous prime is 20121010021193. The next prime is 20121010021219. The reversal of 20121010021211 is 11212001012102.

It is not a de Polignac number, because 20121010021211 - 2²² = 20121005826907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121010021219) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 94278041 + ... + 94491221.

It is an arithmetic number, because the mean of its divisors is an integer number (1391227437456).

Almost surely, 2^{20121010021211} is an apocalyptic number.

20121010021211 is a deficient number, since it is larger than the sum of its proper divisors (2138628978085).

20121010021211 is a wasteful number, since it uses less digits than its factorization.

20121010021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334114.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20121010021211 its reverse (11212001012102), we get a palindrome (31333011033313).

The spelling of 20121010021211 in words is "twenty trillion, one hundred twenty-one billion, ten million, twenty-one thousand, two hundred eleven".