1221471560424 has 32 divisors (see below), whose sum is σ = 3053716806240. Its totient is φ = 407152132800.

The previous prime is 1221471560399. The next prime is 1221471560461. The reversal of 1221471560424 is 4240651741221.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2006259 + ... + 2543229.

It is an arithmetic number, because the mean of its divisors is an integer number (95428650195).

Almost surely, 2^{1221471560424} is an apocalyptic number.

It is an amenable number.

1221471560424 is an abundant number, since it is smaller than the sum of its proper divisors (1832245245816).

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

1221471560424 is a wasteful number, since it uses less digits than its factorization.

1221471560424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631761 (or 631757 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 39.

The spelling of 1221471560424 in words is "one trillion, two hundred twenty-one billion, four hundred seventy-one million, five hundred sixty thousand, four hundred twenty-four".