1213020402 has 24 divisors (see below), whose sum is σ = 2666641488. Its totient is φ = 367581720.

The previous prime is 1213020377. The next prime is 1213020449. The reversal of 1213020402 is 2040203121.

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, 834688 + ... + 836139.

It is an arithmetic number, because the mean of its divisors is an integer number (111110062).

Almost surely, 2^1213020402 is an apocalyptic number.

1213020402 is an abundant number, since it is smaller than the sum of its proper divisors (1453621086).

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

1213020402 is a wasteful number, since it uses less digits than its factorization.

1213020402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1670854 (or 1670843 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1213020402 is about 34828.4424285669. The cubic root of 1213020402 is about 1066.4881521355.

Adding to 1213020402 its reverse (2040203121), we get a palindrome (3253223523).

The spelling of 1213020402 in words is "one billion, two hundred thirteen million, twenty thousand, four hundred two".