30311123112020 has 48 divisors (see below), whose sum is σ = 64218013589520. Its totient is φ = 12016900417536.

The previous prime is 30311123111923. The next prime is 30311123112031. The reversal of 30311123112020 is 2021132111303.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 3437308584004 + 26873814528016 = 1853998^2 + 5183996^2 .

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 = 30311123111983 and 30311123112001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136639514 + ... + 136861166.

It is an arithmetic number, because the mean of its divisors is an integer number (1337875283115).

Almost surely, 2^{30311123112020} is an apocalyptic number.

It is an amenable number.

30311123112020 is an abundant number, since it is smaller than the sum of its proper divisors (33906890477500).

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

30311123112020 is a wasteful number, since it uses less digits than its factorization.

30311123112020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282284 (or 282282 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 30311123112020 its reverse (2021132111303), we get a palindrome (32332255223323).

The spelling of 30311123112020 in words is "thirty trillion, three hundred eleven billion, one hundred twenty-three million, one hundred twelve thousand, twenty".