1221207423244 has 24 divisors (see below), whose sum is σ = 2138961566448. Its totient is φ = 610075677120.

The previous prime is 1221207423211. The next prime is 1221207423259. The reversal of 1221207423244 is 4423247021221.

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, 60604779 + ... + 60624925.

It is an arithmetic number, because the mean of its divisors is an integer number (89123398602).

Almost surely, 2^{1221207423244} is an apocalyptic number.

It is an amenable number.

1221207423244 is a deficient number, since it is larger than the sum of its proper divisors (917754143204).

1221207423244 is a wasteful number, since it uses less digits than its factorization.

1221207423244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32505 (or 32503 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 34.

The spelling of 1221207423244 in words is "one trillion, two hundred twenty-one billion, two hundred seven million, four hundred twenty-three thousand, two hundred forty-four".