1022111220 has 48 divisors (see below), whose sum is σ = 3082060800. Its totient is φ = 251596416.

The previous prime is 1022111171. The next prime is 1022111257. The reversal of 1022111220 is 221112201.

It is a super-2 number, since 2×1022111220² = 2089422692099776800, which contains 22 as substring.

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 = 1022111196 and 1022111205.

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, 654420 + ... + 655979.

It is an arithmetic number, because the mean of its divisors is an integer number (64209600).

Almost surely, 2^1022111220 is an apocalyptic number.

1022111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1022111220 is an abundant number, since it is smaller than the sum of its proper divisors (2059949580).

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

1022111220 is a wasteful number, since it uses less digits than its factorization.

1022111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310424 (or 1310422 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1022111220 is about 31970.4741910407. The cubic root of 1022111220 is about 1007.3167413955.

Adding to 1022111220 its reverse (221112201), we get a palindrome (1243223421).

The spelling of 1022111220 in words is "one billion, twenty-two million, one hundred eleven thousand, two hundred twenty".