211028520931 has 2 divisors, whose sum is σ = 211028520932. Its totient is φ = 211028520930.

The previous prime is 211028520827. The next prime is 211028520991. The reversal of 211028520931 is 139025820112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211028520931 - 2²¹ = 211026423779 is a prime.

It is a super-2 number, since 2×211028520931² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211028520991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105514260465 + 105514260466.

It is an arithmetic number, because the mean of its divisors is an integer number (105514260466).

Almost surely, 2^211028520931 is an apocalyptic number.

211028520931 is a deficient number, since it is larger than the sum of its proper divisors (1).

211028520931 is an equidigital number, since it uses as much as digits as its factorization.

211028520931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 34.

The spelling of 211028520931 in words is "two hundred eleven billion, twenty-eight million, five hundred twenty thousand, nine hundred thirty-one".