31103012201020 has 24 divisors (see below), whose sum is σ = 66835309940784. Its totient is φ = 12151874534016.

The previous prime is 31103012201011. The next prime is 31103012201039. The reversal of 31103012201020 is 2010221030113.

It is a junction number, because it is equal to n+sod(n) for n = 31103012200985 and 31103012201003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18083145769 + ... + 18083147488.

It is an arithmetic number, because the mean of its divisors is an integer number (2784804580866).

Almost surely, 2^{31103012201020} is an apocalyptic number.

It is an amenable number.

31103012201020 is an abundant number, since it is smaller than the sum of its proper divisors (35732297739764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31103012201020 is a wasteful number, since it uses less digits than its factorization.

31103012201020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36166293309 (or 36166293307 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31103012201020 its reverse (2010221030113), we get a palindrome (33113233231133).

The spelling of 31103012201020 in words is "thirty-one trillion, one hundred three billion, twelve million, two hundred one thousand, twenty".