2121022010220 has 96 divisors (see below), whose sum is σ = 6321674419200. Its totient is φ = 529816472064.

The previous prime is 2121022010207. The next prime is 2121022010291. The reversal of 2121022010220 is 220102201212.

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 2121022010220.

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, 10351044 + ... + 10553963.

It is an arithmetic number, because the mean of its divisors is an integer number (65850775200).

Almost surely, 2^{2121022010220} is an apocalyptic number.

2121022010220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121022010220 is an abundant number, since it is smaller than the sum of its proper divisors (4200652408980).

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

2121022010220 is a wasteful number, since it uses less digits than its factorization.

2121022010220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20905127 (or 20905125 counting only the distinct ones).

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

Adding to 2121022010220 its reverse (220102201212), we get a palindrome (2341124211432).

The spelling of 2121022010220 in words is "two trillion, one hundred twenty-one billion, twenty-two million, ten thousand, two hundred twenty".