1213011436 has 48 divisors (see below), whose sum is σ = 2618936320. Its totient is φ = 478716480.

The previous prime is 1213011427. The next prime is 1213011451. The reversal of 1213011436 is 6341103121.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156001 + ... + 163591.

Almost surely, 2^1213011436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213011436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1309468160).

1213011436 is an abundant number, since it is smaller than the sum of its proper divisors (1405924884).

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

1213011436 is a wasteful number, since it uses less digits than its factorization.

1213011436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8054 (or 8052 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1213011436 is about 34828.3137116915. The cubic root of 1213011436 is about 1066.4855244918.

Adding to 1213011436 its reverse (6341103121), we get a palindrome (7554114557).

The spelling of 1213011436 in words is "one billion, two hundred thirteen million, eleven thousand, four hundred thirty-six".