891020222032031 has 48 divisors (see below), whose sum is σ = 1134536954362560. Its totient is φ = 693416717521920.

The previous prime is 891020222032021. The next prime is 891020222032051. The reversal of 891020222032031 is 130230222020198.

It is not a de Polignac number, because 891020222032031 - 2²⁶ = 891020154923167 is a prime.

It is a super-2 number, since 2×891020222032031² (a number of 31 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 891020222031982 and 891020222032000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891020222032021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5258005655 + ... + 5258175111.

It is an arithmetic number, because the mean of its divisors is an integer number (23636186549220).

Almost surely, 2^{891020222032031} is an apocalyptic number.

891020222032031 is a deficient number, since it is larger than the sum of its proper divisors (243516732330529).

891020222032031 is a wasteful number, since it uses less digits than its factorization.

891020222032031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304864 (or 304857 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The spelling of 891020222032031 in words is "eight hundred ninety-one trillion, twenty billion, two hundred twenty-two million, thirty-two thousand, thirty-one".