211121222131 has 2 divisors, whose sum is σ = 211121222132. Its totient is φ = 211121222130.

The previous prime is 211121222083. The next prime is 211121222153. The reversal of 211121222131 is 131222121112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211121222131 - 2¹⁷ = 211121091059 is a prime.

It is a super-2 number, since 2×211121222131² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211121222099 and 211121222108.

It is not a weakly prime, because it can be changed into another prime (211121222171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105560611065 + 105560611066.

It is an arithmetic number, because the mean of its divisors is an integer number (105560611066).

Almost surely, 2^211121222131 is an apocalyptic number.

211121222131 is a deficient number, since it is larger than the sum of its proper divisors (1).

211121222131 is an equidigital number, since it uses as much as digits as its factorization.

211121222131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96, while the sum is 19.

Adding to 211121222131 its reverse (131222121112), we get a palindrome (342343343243).

The spelling of 211121222131 in words is "two hundred eleven billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred thirty-one".