1321225512542 has 16 divisors (see below), whose sum is σ = 2158268127120. Its totient is φ = 602944744512.

The previous prime is 1321225512539. The next prime is 1321225512571. The reversal of 1321225512542 is 2452155221231.

It is a congruent number.

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, 285482888 + ... + 285487515.

It is an arithmetic number, because the mean of its divisors is an integer number (134891757945).

Almost surely, 2^{1321225512542} is an apocalyptic number.

1321225512542 is a deficient number, since it is larger than the sum of its proper divisors (837042614578).

1321225512542 is a wasteful number, since it uses less digits than its factorization.

1321225512542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570970507.

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

The spelling of 1321225512542 in words is "one trillion, three hundred twenty-one billion, two hundred twenty-five million, five hundred twelve thousand, five hundred forty-two".