2021120221020 has 96 divisors (see below), whose sum is σ = 5699478038016. Its totient is φ = 535135507200.

The previous prime is 2021120221007. The next prime is 2021120221031. The reversal of 2021120221020 is 201220211202.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5140257 + ... + 5519463.

It is an arithmetic number, because the mean of its divisors is an integer number (59369562896).

Almost surely, 2^{2021120221020} is an apocalyptic number.

2021120221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021120221020 is an abundant number, since it is smaller than the sum of its proper divisors (3678357816996).

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

2021120221020 is a wasteful number, since it uses less digits than its factorization.

2021120221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379851 (or 379849 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2021120221020 its reverse (201220211202), we get a palindrome (2222340432222).

The spelling of 2021120221020 in words is "two trillion, twenty-one billion, one hundred twenty million, two hundred twenty-one thousand, twenty".