302120100020 has 12 divisors (see below), whose sum is σ = 634452210084. Its totient is φ = 120848040000.

The previous prime is 302120100001. The next prime is 302120100031. The reversal of 302120100020 is 20001021203.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 220896240016 + 81223860004 = 469996^2 + 284998^2 .

It is a junction number, because it is equal to n+sod(n) for n = 302120099974 and 302120100010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7553002481 + ... + 7553002520.

It is an arithmetic number, because the mean of its divisors is an integer number (52871017507).

Almost surely, 2^302120100020 is an apocalyptic number.

It is an amenable number.

302120100020 is an abundant number, since it is smaller than the sum of its proper divisors (332332110064).

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

302120100020 is a wasteful number, since it uses less digits than its factorization.

302120100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15106005010 (or 15106005008 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 302120100020 its reverse (20001021203), we get a palindrome (322121121223).

The spelling of 302120100020 in words is "three hundred two billion, one hundred twenty million, one hundred thousand, twenty".