151210121 has 4 divisors (see below), whose sum is σ = 160104852. Its totient is φ = 142315392.

The previous prime is 151210093. The next prime is 151210123. The reversal of 151210121 is 121012151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121012151 = 13 ⋅9308627.

It can be written as a sum of positive squares in 2 ways, for example, as 60217600 + 90992521 = 7760^2 + 9539^2 .

It is a cyclic number.

It is not a de Polignac number, because 151210121 - 2⁶ = 151210057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 151210096 and 151210105.

It is not an unprimeable number, because it can be changed into a prime (151210123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4447340 + ... + 4447373.

It is an arithmetic number, because the mean of its divisors is an integer number (40026213).

Almost surely, 2^151210121 is an apocalyptic number.

It is an amenable number.

151210121 is a deficient number, since it is larger than the sum of its proper divisors (8894731).

151210121 is an equidigital number, since it uses as much as digits as its factorization.

151210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8894730.

The product of its (nonzero) digits is 20, while the sum is 14.

The square root of 151210121 is about 12296.7524574580. The cubic root of 151210121 is about 532.7542876539.

Adding to 151210121 its reverse (121012151), we get a palindrome (272222272).

The spelling of 151210121 in words is "one hundred fifty-one million, two hundred ten thousand, one hundred twenty-one".