1213111221232 has 20 divisors (see below), whose sum is σ = 2350545788080. Its totient is φ = 606518759808.

The previous prime is 1213111221221. The next prime is 1213111221253. The reversal of 1213111221232 is 2321221113121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2030613 + ... + 2559220.

It is an arithmetic number, because the mean of its divisors is an integer number (117527289404).

Almost surely, 2^{1213111221232} is an apocalyptic number.

It is an amenable number.

1213111221232 is a deficient number, since it is larger than the sum of its proper divisors (1137434566848).

1213111221232 is a wasteful number, since it uses less digits than its factorization.

1213111221232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4606360 (or 4606354 counting only the distinct ones).

The product of its digits is 288, while the sum is 22.

Adding to 1213111221232 its reverse (2321221113121), we get a palindrome (3534332334353).

The spelling of 1213111221232 in words is "one trillion, two hundred thirteen billion, one hundred eleven million, two hundred twenty-one thousand, two hundred thirty-two".