981031121 has 32 divisors (see below), whose sum is σ = 1244989440. Its totient is φ = 753198336.

The previous prime is 981031109. The next prime is 981031127. The reversal of 981031121 is 121130189.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-981031121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (981031127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 620510 + ... + 622088.

It is an arithmetic number, because the mean of its divisors is an integer number (38905920).

Almost surely, 2^981031121 is an apocalyptic number.

It is an amenable number.

981031121 is a deficient number, since it is larger than the sum of its proper divisors (263958319).

981031121 is a wasteful number, since it uses less digits than its factorization.

981031121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1853.

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 981031121 is about 31321.4163313219. The cubic root of 981031121 is about 993.6366337932.

The spelling of 981031121 in words is "nine hundred eighty-one million, thirty-one thousand, one hundred twenty-one".