2021121102220 has 24 divisors (see below), whose sum is σ = 4630204707408. Its totient is φ = 734953128000.

The previous prime is 2021121102211. The next prime is 2021121102229. The reversal of 2021121102220 is 222011211202.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2021121102211) and next prime (2021121102229).

It is a junction number, because it is equal to n+sod(n) for n = 2021121102194 and 2021121102203.

It is not an unprimeable number, because it can be changed into a prime (2021121102229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4593456831 + ... + 4593457270.

It is an arithmetic number, because the mean of its divisors is an integer number (192925196142).

Almost surely, 2^{2021121102220} is an apocalyptic number.

2021121102220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021121102220 is an abundant number, since it is smaller than the sum of its proper divisors (2609083605188).

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

2021121102220 is a wasteful number, since it uses less digits than its factorization.

2021121102220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9186914121 (or 9186914119 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2021121102220 its reverse (222011211202), we get a palindrome (2243132313422).

The spelling of 2021121102220 in words is "two trillion, twenty-one billion, one hundred twenty-one million, one hundred two thousand, two hundred twenty".