1213421433 has 16 divisors (see below), whose sum is σ = 1850618880. Its totient is φ = 692785296.

The previous prime is 1213421431. The next prime is 1213421441. The reversal of 1213421433 is 3341243121.

It is a happy number.

It is not a de Polignac number, because 1213421433 - 2¹ = 1213421431 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1213421431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 588 + ... + 49266.

It is an arithmetic number, because the mean of its divisors is an integer number (115663680).

Almost surely, 2^1213421433 is an apocalyptic number.

It is an amenable number.

1213421433 is a deficient number, since it is larger than the sum of its proper divisors (637197447).

1213421433 is a wasteful number, since it uses less digits than its factorization.

1213421433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49876.

The product of its digits is 1728, while the sum is 24.

The square root of 1213421433 is about 34834.1991870059. The cubic root of 1213421433 is about 1066.6056680721.

Adding to 1213421433 its reverse (3341243121), we get a palindrome (4554664554).

The spelling of 1213421433 in words is "one billion, two hundred thirteen million, four hundred twenty-one thousand, four hundred thirty-three".