2121020000220 has 48 divisors (see below), whose sum is σ = 6478752002688. Its totient is φ = 514186666560.

The previous prime is 2121020000201. The next prime is 2121020000251. The reversal of 2121020000220 is 220000201212.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 2121020000196 and 2121020000205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1606832674 + ... + 1606833993.

It is an arithmetic number, because the mean of its divisors is an integer number (134974000056).

Almost surely, 2^{2121020000220} is an apocalyptic number.

2121020000220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121020000220 is an abundant number, since it is smaller than the sum of its proper divisors (4357732002468).

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

2121020000220 is a wasteful number, since it uses less digits than its factorization.

2121020000220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3213666690 (or 3213666688 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 2121020000220 its reverse (220000201212), we get a palindrome (2341020201432).

The spelling of 2121020000220 in words is "two trillion, one hundred twenty-one billion, twenty million, two hundred twenty", and thus it is an aban number.