211221023203131 has 16 divisors (see below), whose sum is σ = 285815070616320. Its totient is φ = 138729947187680.

The previous prime is 211221023203129. The next prime is 211221023203189. The reversal of 211221023203131 is 131302320122112.

211221023203131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 211221023203131 - 2¹ = 211221023203129 is a prime.

It is a super-2 number, since 2×211221023203131² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211221023205131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1181355180 + ... + 1181533961.

It is an arithmetic number, because the mean of its divisors is an integer number (17863441913520).

Almost surely, 2^{211221023203131} is an apocalyptic number.

211221023203131 is a deficient number, since it is larger than the sum of its proper divisors (74594047413189).

211221023203131 is a wasteful number, since it uses less digits than its factorization.

211221023203131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2362889586.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 211221023203131 its reverse (131302320122112), we get a palindrome (342523343325243).

The spelling of 211221023203131 in words is "two hundred eleven trillion, two hundred twenty-one billion, twenty-three million, two hundred three thousand, one hundred thirty-one".