2101021022220 has 48 divisors (see below), whose sum is σ = 5882978481408. Its totient is φ = 560260880320.

The previous prime is 2101021022203. The next prime is 2101021022251. The reversal of 2101021022220 is 222201201012.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2101021022220.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2859385 + ... + 3518255.

It is an arithmetic number, because the mean of its divisors is an integer number (122562051696).

Almost surely, 2^{2101021022220} is an apocalyptic number.

2101021022220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101021022220 is an abundant number, since it is smaller than the sum of its proper divisors (3781957459188).

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

2101021022220 is a wasteful number, since it uses less digits than its factorization.

2101021022220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712030 (or 712028 counting only the distinct ones).

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

Adding to 2101021022220 its reverse (222201201012), we get a palindrome (2323222223232).

The spelling of 2101021022220 in words is "two trillion, one hundred one billion, twenty-one million, twenty-two thousand, two hundred twenty".