31523034121 has 8 divisors (see below), whose sum is σ = 33225990080. Its totient is φ = 29824463088.

The previous prime is 31523034113. The next prime is 31523034143. The reversal of 31523034121 is 12143032513.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31523034121 - 2³ = 31523034113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31523037121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1081461 + ... + 1110226.

It is an arithmetic number, because the mean of its divisors is an integer number (4153248760).

Almost surely, 2^31523034121 is an apocalyptic number.

It is an amenable number.

31523034121 is a deficient number, since it is larger than the sum of its proper divisors (1702955959).

31523034121 is a wasteful number, since it uses less digits than its factorization.

31523034121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2192463.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 31523034121 its reverse (12143032513), we get a palindrome (43666066634).

The spelling of 31523034121 in words is "thirty-one billion, five hundred twenty-three million, thirty-four thousand, one hundred twenty-one".