31121101012030 has 32 divisors (see below), whose sum is σ = 56650280865120. Its totient is φ = 12307943746560.

The previous prime is 31121101012021. The next prime is 31121101012033. The reversal of 31121101012030 is 3021010112113.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31121101011995 and 31121101012013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31121101012033) 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, 16801590 + ... + 18561670.

It is an arithmetic number, because the mean of its divisors is an integer number (1770321277035).

Almost surely, 2^{31121101012030} is an apocalyptic number.

31121101012030 is a deficient number, since it is larger than the sum of its proper divisors (25529179853090).

31121101012030 is a wasteful number, since it uses less digits than its factorization.

31121101012030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1780044.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 31121101012030 its reverse (3021010112113), we get a palindrome (34142111124143).

The spelling of 31121101012030 in words is "thirty-one trillion, one hundred twenty-one billion, one hundred one million, twelve thousand, thirty".