151420121 has 2 divisors, whose sum is σ = 151420122. Its totient is φ = 151420120.

The previous prime is 151420103. The next prime is 151420127. The reversal of 151420121 is 121024151.

151420121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142539721 + 8880400 = 11939^2 + 2980^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-151420121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 151420121.

It is not a weakly prime, because it can be changed into another prime (151420127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75710060 + 75710061.

It is an arithmetic number, because the mean of its divisors is an integer number (75710061).

Almost surely, 2^151420121 is an apocalyptic number.

It is an amenable number.

151420121 is a deficient number, since it is larger than the sum of its proper divisors (1).

151420121 is an equidigital number, since it uses as much as digits as its factorization.

151420121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 151420121 is about 12305.2883346958. The cubic root of 151420121 is about 533.0008025642. Note that the first 3 decimals are identical.

Adding to 151420121 its reverse (121024151), we get a palindrome (272444272).

The spelling of 151420121 in words is "one hundred fifty-one million, four hundred twenty thousand, one hundred twenty-one".