2021021121012 has 12 divisors (see below), whose sum is σ = 4715715949056. Its totient is φ = 673673707000.

The previous prime is 2021021121011. The next prime is 2021021121043. The reversal of 2021021121012 is 2101211201202.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×2021021121012² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2021021120982 and 2021021121000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021021121011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84209213364 + ... + 84209213387.

It is an arithmetic number, because the mean of its divisors is an integer number (392976329088).

Almost surely, 2^{2021021121012} is an apocalyptic number.

It is an amenable number.

2021021121012 is an abundant number, since it is smaller than the sum of its proper divisors (2694694828044).

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

2021021121012 is a wasteful number, since it uses less digits than its factorization.

2021021121012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168418426758 (or 168418426756 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2021021121012 its reverse (2101211201202), we get a palindrome (4122232322214).

The spelling of 2021021121012 in words is "two trillion, twenty-one billion, twenty-one million, one hundred twenty-one thousand, twelve".