2120001211220 has 12 divisors (see below), whose sum is σ = 4452002543604. Its totient is φ = 848000484480.

The previous prime is 2120001211061. The next prime is 2120001211267. The reversal of 2120001211220 is 221121000212.

It can be written as a sum of positive squares in 2 ways, for example, as 943878313156 + 1176122898064 = 971534^2 + 1084492^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2120001211195 and 2120001211204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53000030261 + ... + 53000030300.

It is an arithmetic number, because the mean of its divisors is an integer number (371000211967).

Almost surely, 2^{2120001211220} is an apocalyptic number.

2120001211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120001211220 is an abundant number, since it is smaller than the sum of its proper divisors (2332001332384).

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

2120001211220 is a wasteful number, since it uses less digits than its factorization.

2120001211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106000060570 (or 106000060568 counting only the distinct ones).

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

Adding to 2120001211220 its reverse (221121000212), we get a palindrome (2341122211432).

The spelling of 2120001211220 in words is "two trillion, one hundred twenty billion, one million, two hundred eleven thousand, two hundred twenty".