2120011021220 has 48 divisors (see below), whose sum is σ = 4720037358960. Its totient is φ = 797083828224.

The previous prime is 2120011021157. The next prime is 2120011021223. The reversal of 2120011021220 is 221201100212.

It can be written as a sum of positive squares in 8 ways, for example, as 50049743524 + 2069961277696 = 223718^2 + 1438736^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2120011021195 and 2120011021204.

It is not an unprimeable number, because it can be changed into a prime (2120011021223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3792719 + ... + 4315638.

It is an arithmetic number, because the mean of its divisors is an integer number (98334111645).

Almost surely, 2^{2120011021220} is an apocalyptic number.

2120011021220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120011021220 is an abundant number, since it is smaller than the sum of its proper divisors (2600026337740).

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

2120011021220 is a wasteful number, since it uses less digits than its factorization.

2120011021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8109152 (or 8109150 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2120011021220 its reverse (221201100212), we get a palindrome (2341212121432).

The spelling of 2120011021220 in words is "two trillion, one hundred twenty billion, eleven million, twenty-one thousand, two hundred twenty".