2021000121020 has 48 divisors (see below), whose sum is σ = 4495488203808. Its totient is φ = 760553349120.

The previous prime is 2021000120987. The next prime is 2021000121031. The reversal of 2021000121020 is 201210001202.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2021000120992 and 2021000121010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264566 + ... + 2027805.

It is an arithmetic number, because the mean of its divisors is an integer number (93656004246).

Almost surely, 2^{2021000121020} is an apocalyptic number.

2021000121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021000121020 is an abundant number, since it is smaller than the sum of its proper divisors (2474488082788).

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

2021000121020 is a wasteful number, since it uses less digits than its factorization.

2021000121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2294990 (or 2294988 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2021000121020 its reverse (201210001202), we get a palindrome (2222210122222).

The spelling of 2021000121020 in words is "two trillion, twenty-one billion, one hundred twenty-one thousand, twenty".