10021121000020 has 48 divisors (see below), whose sum is σ = 22667411289600. Its totient is φ = 3699410587776.

The previous prime is 10021121000017. The next prime is 10021121000027. The reversal of 10021121000020 is 2000012112001.

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 = 10021120999970 and 10021121000006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021121000027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2236420 + ... + 5004379.

It is an arithmetic number, because the mean of its divisors is an integer number (472237735200).

Almost surely, 2^{10021121000020} is an apocalyptic number.

10021121000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10021121000020 is an abundant number, since it is smaller than the sum of its proper divisors (12646290289580).

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

10021121000020 is a wasteful number, since it uses less digits than its factorization.

10021121000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7246144 (or 7246142 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 10021121000020 its reverse (2000012112001), we get a palindrome (12021133112021).

The spelling of 10021121000020 in words is "ten trillion, twenty-one billion, one hundred twenty-one million, twenty", and thus it is an aban number.