2111121201220 has 96 divisors (see below), whose sum is σ = 4558951918080. Its totient is φ = 820869603840.

The previous prime is 2111121201187. The next prime is 2111121201239. The reversal of 2111121201220 is 221021211112.

It is a junction number, because it is equal to n+sod(n) for n = 2111121201194 and 2111121201203.

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, 249507790 + ... + 249516250.

It is an arithmetic number, because the mean of its divisors is an integer number (47489082480).

Almost surely, 2^{2111121201220} is an apocalyptic number.

2111121201220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2111121201220 is an abundant number, since it is smaller than the sum of its proper divisors (2447830716860).

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

2111121201220 is a wasteful number, since it uses less digits than its factorization.

2111121201220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10973 (or 10971 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2111121201220 its reverse (221021211112), we get a palindrome (2332142412332).

The spelling of 2111121201220 in words is "two trillion, one hundred eleven billion, one hundred twenty-one million, two hundred one thousand, two hundred twenty".