1220111022220 has 24 divisors (see below), whose sum is σ = 2624726639808. Its totient is φ = 476140886400.

The previous prime is 1220111022211. The next prime is 1220111022241. The reversal of 1220111022220 is 222201110221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1220111022194 and 1220111022203.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 743969316 + ... + 743970955.

It is an arithmetic number, because the mean of its divisors is an integer number (109363609992).

Almost surely, 2^{1220111022220} is an apocalyptic number.

1220111022220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220111022220 is an abundant number, since it is smaller than the sum of its proper divisors (1404615617588).

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

1220111022220 is a wasteful number, since it uses less digits than its factorization.

1220111022220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1487940321 (or 1487940319 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1220111022220 its reverse (222201110221), we get a palindrome (1442312132441).

The spelling of 1220111022220 in words is "one trillion, two hundred twenty billion, one hundred eleven million, twenty-two thousand, two hundred twenty".