151700121 has 10 divisors (see below), whose sum is σ = 226613882. Its totient is φ = 101133360.

The previous prime is 151700113. The next prime is 151700137. The reversal of 151700121 is 121007151.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 124545600 + 27154521 = 11160^2 + 5211^2 .

It is not a de Polignac number, because 151700121 - 2³ = 151700113 is a prime.

It is a super-2 number, since 2×151700121² = 46025853422829282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 151700094 and 151700103.

It is not an unprimeable number, because it can be changed into a prime (151700191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 936340 + ... + 936501.

Almost surely, 2^151700121 is an apocalyptic number.

It is an amenable number.

151700121 is a deficient number, since it is larger than the sum of its proper divisors (74913761).

151700121 is an equidigital number, since it uses as much as digits as its factorization.

151700121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1872853 (or 1872844 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 18.

The square root of 151700121 is about 12316.6603022085. The cubic root of 151700121 is about 533.3291348194.

Adding to 151700121 its reverse (121007151), we get a palindrome (272707272).

The spelling of 151700121 in words is "one hundred fifty-one million, seven hundred thousand, one hundred twenty-one".