1221432212124 has 36 divisors (see below), whose sum is σ = 3162814309200. Its totient is φ = 397213727040.

The previous prime is 1221432212123. The next prime is 1221432212153. The reversal of 1221432212124 is 4212122341221.

1221432212124 is a `hidden beast` number, since 1 + 2 + 2 + 1 + 432 + 212 + 12 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221432212123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 413762824 + ... + 413765775.

Almost surely, 2^{1221432212124} is an apocalyptic number.

It is an amenable number.

1221432212124 is an abundant number, since it is smaller than the sum of its proper divisors (1941382097076).

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

1221432212124 is a wasteful number, since it uses less digits than its factorization.

1221432212124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827528650 (or 827528645 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

Adding to 1221432212124 its reverse (4212122341221), we get a palindrome (5433554553345).

The spelling of 1221432212124 in words is "one trillion, two hundred twenty-one billion, four hundred thirty-two million, two hundred twelve thousand, one hundred twenty-four".