2021001212120 has 64 divisors (see below), whose sum is σ = 4960971671040. Its totient is φ = 734860297600.

The previous prime is 2021001212081. The next prime is 2021001212123. The reversal of 2021001212120 is 212121001202.

It is a junction number, because it is equal to n+sod(n) for n = 2021001212095 and 2021001212104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021001212123) 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, 6775649 + ... + 7067631.

It is an arithmetic number, because the mean of its divisors is an integer number (77515182360).

Almost surely, 2^{2021001212120} is an apocalyptic number.

2021001212120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021001212120 is an abundant number, since it is smaller than the sum of its proper divisors (2939970458920).

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

2021001212120 is a wasteful number, since it uses less digits than its factorization.

2021001212120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307736 (or 307732 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2021001212120 its reverse (212121001202), we get a palindrome (2233122213322).

The spelling of 2021001212120 in words is "two trillion, twenty-one billion, one million, two hundred twelve thousand, one hundred twenty".