1021022220 has 48 divisors (see below), whose sum is σ = 2876428800. Its totient is φ = 270599616.

The previous prime is 1021022213. The next prime is 1021022257. The reversal of 1021022220 is 222201201.

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 = 1021022196 and 1021022205.

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, 42420 + ... + 61979.

It is an arithmetic number, because the mean of its divisors is an integer number (59925600).

Almost surely, 2^1021022220 is an apocalyptic number.

1021022220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021022220 is an abundant number, since it is smaller than the sum of its proper divisors (1855406580).

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

1021022220 is a wasteful number, since it uses less digits than its factorization.

1021022220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104574 (or 104572 counting only the distinct ones).

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

The square root of 1021022220 is about 31953.4383126449. The cubic root of 1021022220 is about 1006.9588684863.

Adding to 1021022220 its reverse (222201201), we get a palindrome (1243223421).

The spelling of 1021022220 in words is "one billion, twenty-one million, twenty-two thousand, two hundred twenty".