1121506553321 has 24 divisors (see below), whose sum is σ = 1414729639680. Its totient is φ = 870244562880.

The previous prime is 1121506553303. The next prime is 1121506553341. The reversal of 1121506553321 is 1233556051211.

It is a de Polignac number, because none of the positive numbers 2^k-1121506553321 is a prime.

It is a super-2 number, since 2×1121506553321² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1121506553341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2567636 + ... + 2972501.

It is an arithmetic number, because the mean of its divisors is an integer number (58947068320).

Almost surely, 2^{1121506553321} is an apocalyptic number.

1121506553321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1121506553321 is a deficient number, since it is larger than the sum of its proper divisors (293223086359).

1121506553321 is a wasteful number, since it uses less digits than its factorization.

1121506553321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5540405 (or 5540394 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 35.

The spelling of 1121506553321 in words is "one trillion, one hundred twenty-one billion, five hundred six million, five hundred fifty-three thousand, three hundred twenty-one".