149911121 has 16 divisors (see below), whose sum is σ = 165523200. Its totient is φ = 135209088.

The previous prime is 149911103. The next prime is 149911123. The reversal of 149911121 is 121119941.

It is a cyclic number.

It is not a de Polignac number, because 149911121 - 2¹⁴ = 149894737 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149911123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38360 + ... + 42086.

It is an arithmetic number, because the mean of its divisors is an integer number (10345200).

Almost surely, 2^149911121 is an apocalyptic number.

It is an amenable number.

149911121 is a deficient number, since it is larger than the sum of its proper divisors (15612079).

149911121 is a wasteful number, since it uses less digits than its factorization.

149911121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3848.

The product of its digits is 648, while the sum is 29.

The square root of 149911121 is about 12243.8197062845. The cubic root of 149911121 is about 531.2243216008.

The spelling of 149911121 in words is "one hundred forty-nine million, nine hundred eleven thousand, one hundred twenty-one".