31300111420220 has 24 divisors (see below), whose sum is σ = 65750440154784. Its totient is φ = 12516195773376.

The previous prime is 31300111420057. The next prime is 31300111420243. The reversal of 31300111420220 is 2202411100313.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 31300111420192 and 31300111420201.

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, 240482984 + ... + 240613103.

It is an arithmetic number, because the mean of its divisors is an integer number (2739601673116).

Almost surely, 2^{31300111420220} is an apocalyptic number.

It is an amenable number.

31300111420220 is an abundant number, since it is smaller than the sum of its proper divisors (34450328734564).

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

31300111420220 is a wasteful number, since it uses less digits than its factorization.

31300111420220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481099349 (or 481099347 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 31300111420220 its reverse (2202411100313), we get a palindrome (33502522520533).

The spelling of 31300111420220 in words is "thirty-one trillion, three hundred billion, one hundred eleven million, four hundred twenty thousand, two hundred twenty".