30311121020 has 12 divisors (see below), whose sum is σ = 63653354184. Its totient is φ = 12124448400.

The previous prime is 30311120947. The next prime is 30311121031. The reversal of 30311121020 is 2012111303.

It is a junction number, because it is equal to n+sod(n) for n = 30311120986 and 30311121004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 757778006 + ... + 757778045.

It is an arithmetic number, because the mean of its divisors is an integer number (5304446182).

Almost surely, 2^30311121020 is an apocalyptic number.

It is an amenable number.

30311121020 is an abundant number, since it is smaller than the sum of its proper divisors (33342233164).

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

30311121020 is a wasteful number, since it uses less digits than its factorization.

30311121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1515556060 (or 1515556058 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 30311121020 its reverse (2012111303), we get a palindrome (32323232323).

The spelling of 30311121020 in words is "thirty billion, three hundred eleven million, one hundred twenty-one thousand, twenty".