211021100131 has 2 divisors, whose sum is σ = 211021100132. Its totient is φ = 211021100130.

The previous prime is 211021100107. The next prime is 211021100159. The reversal of 211021100131 is 131001120112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211021100131 - 2¹⁷ = 211020969059 is a prime.

It is a super-2 number, since 2×211021100131² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211021100161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105510550065 + 105510550066.

It is an arithmetic number, because the mean of its divisors is an integer number (105510550066).

Almost surely, 2^211021100131 is an apocalyptic number.

211021100131 is a deficient number, since it is larger than the sum of its proper divisors (1).

211021100131 is an equidigital number, since it uses as much as digits as its factorization.

211021100131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 211021100131 its reverse (131001120112), we get a palindrome (342022220243).

The spelling of 211021100131 in words is "two hundred eleven billion, twenty-one million, one hundred thousand, one hundred thirty-one".