1213211430 has 48 divisors (see below), whose sum is σ = 3168547200. Its totient is φ = 322066944.

The previous prime is 1213211369. The next prime is 1213211497. The reversal of 1213211430 is 341123121.

1213211430 is a `hidden beast` number, since 1 + 21 + 3 + 211 + 430 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10155 + ... + 50294.

It is an arithmetic number, because the mean of its divisors is an integer number (66011400).

Almost surely, 2^1213211430 is an apocalyptic number.

1213211430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213211430 is an abundant number, since it is smaller than the sum of its proper divisors (1955335770).

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

1213211430 is a wasteful number, since it uses less digits than its factorization.

1213211430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60685 (or 60682 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1213211430 is about 34831.1847343727. The cubic root of 1213211430 is about 1066.5441331684.

Adding to 1213211430 its reverse (341123121), we get a palindrome (1554334551).

The spelling of 1213211430 in words is "one billion, two hundred thirteen million, two hundred eleven thousand, four hundred thirty".