20201211131 has 16 divisors (see below), whose sum is σ = 20991661920. Its totient is φ = 19427865600.

The previous prime is 20201211113. The next prime is 20201211137. The reversal of 20201211131 is 13111210202.

It is a cyclic number.

It is not a de Polignac number, because 20201211131 - 2⁶ = 20201211067 is a prime.

It is a super-2 number, since 2×20201211131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20201211137) 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, 1094681 + ... + 1112981.

It is an arithmetic number, because the mean of its divisors is an integer number (1311978870).

Almost surely, 2^20201211131 is an apocalyptic number.

20201211131 is a deficient number, since it is larger than the sum of its proper divisors (790450789).

20201211131 is a wasteful number, since it uses less digits than its factorization.

20201211131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18766.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 20201211131 its reverse (13111210202), we get a palindrome (33312421333).

The spelling of 20201211131 in words is "twenty billion, two hundred one million, two hundred eleven thousand, one hundred thirty-one".