1221421514232 has 64 divisors (see below), whose sum is σ = 3104052890400. Its totient is φ = 400409187840.

The previous prime is 1221421514231. The next prime is 1221421514263. The reversal of 1221421514232 is 2324151241221.

It is a self number, because there is not a number n which added to its sum of digits gives 1221421514232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221421514231) 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, 10949394 + ... + 11060382.

Almost surely, 2^{1221421514232} is an apocalyptic number.

1221421514232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1221421514232 is an abundant number, since it is smaller than the sum of its proper divisors (1882631376168).

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

1221421514232 is a wasteful number, since it uses less digits than its factorization.

1221421514232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118576 (or 118572 counting only the distinct ones).

The product of its digits is 7680, while the sum is 30.

Adding to 1221421514232 its reverse (2324151241221), we get a palindrome (3545572755453).

The spelling of 1221421514232 in words is "one trillion, two hundred twenty-one billion, four hundred twenty-one million, five hundred fourteen thousand, two hundred thirty-two".