31011030213121 has 16 divisors (see below), whose sum is σ = 35620393248000. Its totient is φ = 26446479542208.

The previous prime is 31011030213089. The next prime is 31011030213131. The reversal of 31011030213121 is 12131203011013.

It is a cyclic number.

It is not a de Polignac number, because 31011030213121 - 2⁵ = 31011030213089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31011030213131) 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, 46211175 + ... + 46877443.

It is an arithmetic number, because the mean of its divisors is an integer number (2226274578000).

Almost surely, 2^{31011030213121} is an apocalyptic number.

It is an amenable number.

31011030213121 is a deficient number, since it is larger than the sum of its proper divisors (4609363034879).

31011030213121 is a wasteful number, since it uses less digits than its factorization.

31011030213121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699888.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 31011030213121 its reverse (12131203011013), we get a palindrome (43142233224134).

The spelling of 31011030213121 in words is "thirty-one trillion, eleven billion, thirty million, two hundred thirteen thousand, one hundred twenty-one".