31350121 has 16 divisors (see below), whose sum is σ = 35054208. Its totient is φ = 27798400.

The previous prime is 31350103. The next prime is 31350149. The reversal of 31350121 is 12105313.

It is a cyclic number.

It is not a de Polignac number, because 31350121 - 2⁵ = 31350089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31350095 and 31350104.

It is not an unprimeable number, because it can be changed into a prime (31350101) 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, 106851 + ... + 107143.

It is an arithmetic number, because the mean of its divisors is an integer number (2190888).

Almost surely, 2^31350121 is an apocalyptic number.

It is an amenable number.

31350121 is a deficient number, since it is larger than the sum of its proper divisors (3704087).

31350121 is a wasteful number, since it uses less digits than its factorization.

31350121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 31350121 is about 5599.1178769517. The cubic root of 31350121 is about 315.3162893476.

Adding to 31350121 its reverse (12105313), we get a palindrome (43455434).

The spelling of 31350121 in words is "thirty-one million, three hundred fifty thousand, one hundred twenty-one".