1221550757141 has 12 divisors (see below), whose sum is σ = 1442993796000. Its totient is φ = 1025077556880.

The previous prime is 1221550757107. The next prime is 1221550757209. The reversal of 1221550757141 is 1417570551221.

It is not a de Polignac number, because 1221550757141 - 2²² = 1221546562837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221550753141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 328548641 + ... + 328552358.

It is an arithmetic number, because the mean of its divisors is an integer number (120249483000).

Almost surely, 2^{1221550757141} is an apocalyptic number.

1221550757141 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1221550757141 is a deficient number, since it is larger than the sum of its proper divisors (221443038859).

1221550757141 is a wasteful number, since it uses less digits than its factorization.

1221550757141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657101036 (or 657101023 counting only the distinct ones).

The product of its (nonzero) digits is 98000, while the sum is 41.

The spelling of 1221550757141 in words is "one trillion, two hundred twenty-one billion, five hundred fifty million, seven hundred fifty-seven thousand, one hundred forty-one".