31121001121030 has 16 divisors (see below), whose sum is σ = 57384089872704. Its totient is φ = 12144780925120.

The previous prime is 31121001121019. The next prime is 31121001121033. The reversal of 31121001121030 is 3012110012113.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31121001120995 and 31121001121013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31121001121033) 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, 37952439982 + ... + 37952440801.

It is an arithmetic number, because the mean of its divisors is an integer number (3586505617044).

Almost surely, 2^{31121001121030} is an apocalyptic number.

31121001121030 is a deficient number, since it is larger than the sum of its proper divisors (26263088751674).

31121001121030 is a wasteful number, since it uses less digits than its factorization.

31121001121030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75904880831.

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

Adding to 31121001121030 its reverse (3012110012113), we get a palindrome (34133111133143).

The spelling of 31121001121030 in words is "thirty-one trillion, one hundred twenty-one billion, one million, one hundred twenty-one thousand, thirty".