211221122013131 has 12 divisors (see below), whose sum is σ = 215588729079360. Its totient is φ = 206940187053600.

The previous prime is 211221122013017. The next prime is 211221122013133. The reversal of 211221122013131 is 131310221122112.

It is a de Polignac number, because none of the positive numbers 2^k-211221122013131 is a prime.

It is a super-2 number, since 2×211221122013131² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211221122013097 and 211221122013106.

It is not an unprimeable number, because it can be changed into a prime (211221122013133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51664571 + ... + 55602788.

It is an arithmetic number, because the mean of its divisors is an integer number (17965727423280).

Almost surely, 2^{211221122013131} is an apocalyptic number.

211221122013131 is a deficient number, since it is larger than the sum of its proper divisors (4367607066229).

211221122013131 is an equidigital number, since it uses as much as digits as its factorization.

211221122013131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107268166 (or 107268113 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 211221122013131 its reverse (131310221122112), we get a palindrome (342531343135243).

The spelling of 211221122013131 in words is "two hundred eleven trillion, two hundred twenty-one billion, one hundred twenty-two million, thirteen thousand, one hundred thirty-one".