20000020102120 has 16 divisors (see below), whose sum is σ = 45000045229860. Its totient is φ = 8000008040832.

The previous prime is 20000020102109. The next prime is 20000020102159. The reversal of 20000020102120 is 2120102000002.

It can be written as a sum of positive squares in 2 ways, for example, as 19465726352004 + 534293750116 = 4411998^2 + 730954^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 20000020102097 and 20000020102106.

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, 250000251237 + ... + 250000251316.

Almost surely, 2^{20000020102120} is an apocalyptic number.

20000020102120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20000020102120 is an abundant number, since it is smaller than the sum of its proper divisors (25000025127740).

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

20000020102120 is a wasteful number, since it uses less digits than its factorization.

20000020102120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500000502564 (or 500000502560 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20000020102120 its reverse (2120102000002), we get a palindrome (22120122102122).

The spelling of 20000020102120 in words is "twenty trillion, twenty million, one hundred two thousand, one hundred twenty".