1213130023220 has 12 divisors (see below), whose sum is σ = 2547573048804. Its totient is φ = 485252009280.

The previous prime is 1213130023199. The next prime is 1213130023223. The reversal of 1213130023220 is 223200313121.

It can be written as a sum of positive squares in 2 ways, for example, as 833444836624 + 379685186596 = 912932^2 + 616186^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 60656501161 = 1213130023220 / (1 + 2 + 1 + 3 + 1 + 3 + 0 + 0 + 2 + 3 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 1213130023192 and 1213130023201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213130023223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30328250561 + ... + 30328250600.

It is an arithmetic number, because the mean of its divisors is an integer number (212297754067).

Almost surely, 2^{1213130023220} is an apocalyptic number.

1213130023220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213130023220 is an abundant number, since it is smaller than the sum of its proper divisors (1334443025584).

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

1213130023220 is a wasteful number, since it uses less digits than its factorization.

1213130023220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60656501170 (or 60656501168 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 1213130023220 its reverse (223200313121), we get a palindrome (1436330336341).

The spelling of 1213130023220 in words is "one trillion, two hundred thirteen billion, one hundred thirty million, twenty-three thousand, two hundred twenty".