1213013020 has 24 divisors (see below), whose sum is σ = 2548123200. Its totient is φ = 485053632.

The previous prime is 1213012979. The next prime is 1213013059. The reversal of 1213013020 is 203103121.

It is a congruent number.

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, 74146 + ... + 89014.

It is an arithmetic number, because the mean of its divisors is an integer number (106171800).

Almost surely, 2^1213013020 is an apocalyptic number.

1213013020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213013020 is an abundant number, since it is smaller than the sum of its proper divisors (1335110180).

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

1213013020 is a wasteful number, since it uses less digits than its factorization.

1213013020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18957 (or 18955 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1213013020 is about 34828.3364518031. The cubic root of 1213013020 is about 1066.4859887117.

Adding to 1213013020 its reverse (203103121), we get a palindrome (1416116141).

The spelling of 1213013020 in words is "one billion, two hundred thirteen million, thirteen thousand, twenty".