11372820881 has 2 divisors, whose sum is σ = 11372820882. Its totient is φ = 11372820880.

The previous prime is 11372820857. The next prime is 11372820923. The reversal of 11372820881 is 18802827311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8173787281 + 3199033600 = 90409^2 + 56560^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11372820881 is a prime.

It is a super-2 number, since 2×11372820881² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11372820821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5686410440 + 5686410441.

It is an arithmetic number, because the mean of its divisors is an integer number (5686410441).

Almost surely, 2^11372820881 is an apocalyptic number.

It is an amenable number.

11372820881 is a deficient number, since it is larger than the sum of its proper divisors (1).

11372820881 is an equidigital number, since it uses as much as digits as its factorization.

11372820881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43008, while the sum is 41.

The spelling of 11372820881 in words is "eleven billion, three hundred seventy-two million, eight hundred twenty thousand, eight hundred eighty-one".