1149915220281 has 45 divisors (see below), whose sum is σ = 1813231301013. Its totient is φ = 726146431560.

The previous prime is 1149915220241. The next prime is 1149915220309. The reversal of 1149915220281 is 1820225199411.

The square root of 1149915220281 is 1072341.

It is a perfect power (a square), and thus also a powerful number.

1149915220281 is a `hidden beast` number, since 1 + 1 + 49 + 9 + 1 + 522 + 0 + 2 + 81 = 666.

It is not a de Polignac number, because 1149915220281 - 2¹⁷ = 1149915089209 is a prime.

It is a super-2 number, since 2×1149915220281² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1149915220211) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 183367176 + ... + 183373446.

Almost surely, 2^{1149915220281} is an apocalyptic number.

1149915220281 is the 1072341-st square number.

1149915220281 is the 536171-st centered octagonal number.

It is an amenable number.

1149915220281 is a deficient number, since it is larger than the sum of its proper divisors (663316080732).

1149915220281 is an frugal number, since it uses more digits than its factorization.

1149915220281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12592 (or 6293 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The spelling of 1149915220281 in words is "one trillion, one hundred forty-nine billion, nine hundred fifteen million, two hundred twenty thousand, two hundred eighty-one".