1321365022536 has 96 divisors (see below), whose sum is σ = 3630457856160. Its totient is φ = 400505504256.

The previous prime is 1321365022517. The next prime is 1321365022543. The reversal of 1321365022536 is 6352205631231.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 1321365022494 and 1321365022503.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2159445 + ... + 2702948.

It is an arithmetic number, because the mean of its divisors is an integer number (37817269335).

Almost surely, 2^{1321365022536} is an apocalyptic number.

It is an amenable number.

1321365022536 is an abundant number, since it is smaller than the sum of its proper divisors (2309092833624).

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

1321365022536 is a wasteful number, since it uses less digits than its factorization.

1321365022536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4862495 (or 4862478 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 39.

The spelling of 1321365022536 in words is "one trillion, three hundred twenty-one billion, three hundred sixty-five million, twenty-two thousand, five hundred thirty-six".