9131122021 has 16 divisors (see below), whose sum is σ = 10662624000. Its totient is φ = 7816323984.

The previous prime is 9131121983. The next prime is 9131122037. The reversal of 9131122021 is 1202211319.

It is not a de Polignac number, because 9131122021 - 2¹¹ = 9131119973 is a prime.

It is a super-2 number, since 2×9131122021² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9131121983 and 9131122001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9131122051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 247920 + ... + 282358.

It is an arithmetic number, because the mean of its divisors is an integer number (666414000).

Almost surely, 2^9131122021 is an apocalyptic number.

It is an amenable number.

9131122021 is a deficient number, since it is larger than the sum of its proper divisors (1531501979).

9131122021 is an equidigital number, since it uses as much as digits as its factorization.

9131122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35233 (or 35219 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 9131122021 is about 95556.9046223244. The cubic root of 9131122021 is about 2090.1368179627.

The spelling of 9131122021 in words is "nine billion, one hundred thirty-one million, one hundred twenty-two thousand, twenty-one".