1301202020 has 24 divisors (see below), whose sum is σ = 2733301368. Its totient is φ = 520332800.

The previous prime is 1301202017. The next prime is 1301202031. The reversal of 1301202020 is 202021031.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 177209344 + 1123992676 = 13312^2 + 33526^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1301201992 and 1301202010.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87530 + ... + 101310.

It is an arithmetic number, because the mean of its divisors is an integer number (113887557).

Almost surely, 2^1301202020 is an apocalyptic number.

1301202020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1301202020 is an abundant number, since it is smaller than the sum of its proper divisors (1432099348).

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

1301202020 is a wasteful number, since it uses less digits than its factorization.

1301202020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18511 (or 18509 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1301202020 is about 36072.1779214951. The cubic root of 1301202020 is about 1091.7291579194.

Adding to 1301202020 its reverse (202021031), we get a palindrome (1503223051).

The spelling of 1301202020 in words is "one billion, three hundred one million, two hundred two thousand, twenty".