10000020012021 has 24 divisors (see below), whose sum is σ = 15560837169696. Its totient is φ = 6151781354400.

The previous prime is 10000020012013. The next prime is 10000020012023. The reversal of 10000020012021 is 12021002000001.

It is not a de Polignac number, because 10000020012021 - 2³ = 10000020012013 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 10000020011994 and 10000020012012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10000020012023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14076255 + ... + 14769596.

It is an arithmetic number, because the mean of its divisors is an integer number (648368215404).

Almost surely, 2^{10000020012021} is an apocalyptic number.

It is an amenable number.

10000020012021 is a deficient number, since it is larger than the sum of its proper divisors (5560817157675).

10000020012021 is a wasteful number, since it uses less digits than its factorization.

10000020012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28848833 (or 28848830 counting only the distinct ones).

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

Adding to 10000020012021 its reverse (12021002000001), we get a palindrome (22021022012022).

The spelling of 10000020012021 in words is "ten trillion, twenty million, twelve thousand, twenty-one".