133151121 has 32 divisors (see below), whose sum is σ = 201916800. Its totient is φ = 87783264.

The previous prime is 133151113. The next prime is 133151131. The reversal of 133151121 is 121151331.

133151121 is a `hidden beast` number, since 133 + 1 + 511 + 21 = 666.

It is not a de Polignac number, because 133151121 - 2³ = 133151113 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 133151094 and 133151103.

It is not an unprimeable number, because it can be changed into a prime (133151131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 233725 + ... + 234293.

It is an arithmetic number, because the mean of its divisors is an integer number (6309900).

Almost surely, 2^133151121 is an apocalyptic number.

It is an amenable number.

133151121 is a deficient number, since it is larger than the sum of its proper divisors (68765679).

133151121 is an frugal number, since it uses more digits than its factorization.

133151121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697 (or 679 counting only the distinct ones).

The product of its digits is 90, while the sum is 18.

The square root of 133151121 is about 11539.1126608592. The cubic root of 133151121 is about 510.6401304552.

The spelling of 133151121 in words is "one hundred thirty-three million, one hundred fifty-one thousand, one hundred twenty-one".