10020020121000 has 192 divisors, whose sum is σ = 34114881462480. Its totient is φ = 2652501350400.

The previous prime is 10020020120993. The next prime is 10020020121017. The reversal of 10020020121000 is 12102002001.

It can be written as a sum of positive squares in 8 ways, for example, as 2032489327716 + 7987530793284 = 1425654^2 + 2826222^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2830269 + ... + 5296268.

Almost surely, 2^{10020020121000} is an apocalyptic number.

10020020121000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10020020121000 is an abundant number, since it is smaller than the sum of its proper divisors (24094861341480).

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

10020020121000 is a wasteful number, since it uses less digits than its factorization.

10020020121000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8126701 (or 8126684 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 10020020121000 its reverse (12102002001), we get a palindrome (10032122123001).

The spelling of 10020020121000 in words is "ten trillion, twenty billion, twenty million, one hundred twenty-one thousand".