11621509331 has 2 divisors, whose sum is σ = 11621509332. Its totient is φ = 11621509330.

The previous prime is 11621509303. The next prime is 11621509381. The reversal of 11621509331 is 13390512611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11621509331 - 2¹⁴ = 11621492947 is a prime.

It is a super-2 number, since 2×11621509331² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11621509381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5810754665 + 5810754666.

It is an arithmetic number, because the mean of its divisors is an integer number (5810754666).

Almost surely, 2^11621509331 is an apocalyptic number.

11621509331 is a deficient number, since it is larger than the sum of its proper divisors (1).

11621509331 is an equidigital number, since it uses as much as digits as its factorization.

11621509331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 32.

The spelling of 11621509331 in words is "eleven billion, six hundred twenty-one million, five hundred nine thousand, three hundred thirty-one".