1321251522542 has 64 divisors (see below), whose sum is σ = 2440456972800. Its totient is φ = 523801313280.

The previous prime is 1321251522529. The next prime is 1321251522571. The reversal of 1321251522542 is 2452251521231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38425934 + ... + 38460302.

It is an arithmetic number, because the mean of its divisors is an integer number (38132140200).

Almost surely, 2^{1321251522542} is an apocalyptic number.

1321251522542 is a deficient number, since it is larger than the sum of its proper divisors (1119205450258).

1321251522542 is a wasteful number, since it uses less digits than its factorization.

1321251522542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37801.

The product of its digits is 48000, while the sum is 35.

The spelling of 1321251522542 in words is "one trillion, three hundred twenty-one billion, two hundred fifty-one million, five hundred twenty-two thousand, five hundred forty-two".