1222321020 has 48 divisors (see below), whose sum is σ = 3425089920. Its totient is φ = 325705536.

The previous prime is 1222321013. The next prime is 1222321031. The reversal of 1222321020 is 201232221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 80559 + ... + 94521.

It is an arithmetic number, because the mean of its divisors is an integer number (71356040).

Almost surely, 2^1222321020 is an apocalyptic number.

1222321020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222321020 is an abundant number, since it is smaller than the sum of its proper divisors (2202768900).

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

1222321020 is a wasteful number, since it uses less digits than its factorization.

1222321020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15434 (or 15432 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1222321020 is about 34961.7079102266. The cubic root of 1222321020 is about 1069.2069180646.

Adding to 1222321020 its reverse (201232221), we get a palindrome (1423553241).

The spelling of 1222321020 in words is "one billion, two hundred twenty-two million, three hundred twenty-one thousand, twenty".