2154650121 has 18 divisors (see below), whose sum is σ = 3370096158. Its totient is φ = 1325937600.

The previous prime is 2154650107. The next prime is 2154650129. The reversal of 2154650121 is 1210564512.

2154650121 is a `hidden beast` number, since 2 + 1 + 5 + 4 + 650 + 1 + 2 + 1 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 213014025 + 1941636096 = 14595^2 + 44064^2 .

It is not a de Polignac number, because 2154650121 - 2¹⁷ = 2154519049 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2154650129) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 706780 + ... + 709821.

Almost surely, 2^2154650121 is an apocalyptic number.

It is an amenable number.

2154650121 is a deficient number, since it is larger than the sum of its proper divisors (1215446037).

2154650121 is a wasteful number, since it uses less digits than its factorization.

2154650121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416633 (or 1416617 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 2154650121 is about 46418.2089378726. The cubic root of 2154650121 is about 1291.5927127375.

The spelling of 2154650121 in words is "two billion, one hundred fifty-four million, six hundred fifty thousand, one hundred twenty-one".