1022012220 has 48 divisors (see below), whose sum is σ = 2883500928. Its totient is φ = 270454080.

The previous prime is 1022012213. The next prime is 1022012237. The reversal of 1022012220 is 222102201.

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 = 1022012196 and 1022012205.

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, 57154 + ... + 72873.

It is an arithmetic number, because the mean of its divisors is an integer number (60072936).

Almost surely, 2^1022012220 is an apocalyptic number.

1022012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1022012220 is an abundant number, since it is smaller than the sum of its proper divisors (1861488708).

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

1022012220 is a wasteful number, since it uses less digits than its factorization.

1022012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130170 (or 130168 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1022012220 is about 31968.9258499562. The cubic root of 1022012220 is about 1007.2842180016.

Adding to 1022012220 its reverse (222102201), we get a palindrome (1244114421).

The spelling of 1022012220 in words is "one billion, twenty-two million, twelve thousand, two hundred twenty".