1220131602 has 24 divisors (see below), whose sum is σ = 2644568784. Its totient is φ = 406564344.

The previous prime is 1220131589. The next prime is 1220131621. The reversal of 1220131602 is 2061310221.

1220131602 is a `hidden beast` number, since 12 + 20 + 1 + 31 + 602 = 666.

It is a super-2 number, since 2×1220131602² = 2977442252398172808, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47073 + ... + 68235.

It is an arithmetic number, because the mean of its divisors is an integer number (110190366).

Almost surely, 2^1220131602 is an apocalyptic number.

1220131602 is an abundant number, since it is smaller than the sum of its proper divisors (1424437182).

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

1220131602 is a wasteful number, since it uses less digits than its factorization.

1220131602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24374 (or 24371 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1220131602 is about 34930.3822194948. The cubic root of 1220131602 is about 1068.5681497100.

Adding to 1220131602 its reverse (2061310221), we get a palindrome (3281441823).

The spelling of 1220131602 in words is "one billion, two hundred twenty million, one hundred thirty-one thousand, six hundred two".