911321211131231 has 4 divisors (see below), whose sum is σ = 964928341197792. Its totient is φ = 857714081064672.

The previous prime is 911321211131209. The next prime is 911321211131249. The reversal of 911321211131231 is 132131112123119.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-911321211131231 is a prime.

It is a super-2 number, since 2×911321211131231² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (911321211131131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26803565033255 + ... + 26803565033288.

It is an arithmetic number, because the mean of its divisors is an integer number (241232085299448).

Almost surely, 2^{911321211131231} is an apocalyptic number.

911321211131231 is a deficient number, since it is larger than the sum of its proper divisors (53607130066561).

911321211131231 is a wasteful number, since it uses less digits than its factorization.

911321211131231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53607130066560.

The product of its digits is 1944, while the sum is 32.

The spelling of 911321211131231 in words is "nine hundred eleven trillion, three hundred twenty-one billion, two hundred eleven million, one hundred thirty-one thousand, two hundred thirty-one".