1213303020 has 24 divisors (see below), whose sum is σ = 3397248624. Its totient is φ = 323547456.

The previous prime is 1213302973. The next prime is 1213303027. The reversal of 1213303020 is 203033121.

It is a super-2 number, since 2×1213303020² = 2944208436682240800, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (1213303027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10110799 + ... + 10110918.

It is an arithmetic number, because the mean of its divisors is an integer number (141552026).

Almost surely, 2^1213303020 is an apocalyptic number.

1213303020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213303020 is an abundant number, since it is smaller than the sum of its proper divisors (2183945604).

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

1213303020 is a wasteful number, since it uses less digits than its factorization.

1213303020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20221729 (or 20221727 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 1213303020 is about 34832.4994796526. The cubic root of 1213303020 is about 1066.5709716668.

Adding to 1213303020 its reverse (203033121), we get a palindrome (1416336141).

The spelling of 1213303020 in words is "one billion, two hundred thirteen million, three hundred three thousand, twenty".