151304212121 has 4 divisors (see below), whose sum is σ = 151340613732. Its totient is φ = 151267810512.

The previous prime is 151304212079. The next prime is 151304212201. The reversal of 151304212121 is 121212403151.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 109934686096 + 41369526025 = 331564^2 + 203395^2 .

It is a cyclic number.

It is not a de Polignac number, because 151304212121 - 2⁶ = 151304212057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (151304212021) 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, 18194570 + ... + 18202883.

It is an arithmetic number, because the mean of its divisors is an integer number (37835153433).

Almost surely, 2^151304212121 is an apocalyptic number.

It is an amenable number.

151304212121 is a deficient number, since it is larger than the sum of its proper divisors (36401611).

151304212121 is an equidigital number, since it uses as much as digits as its factorization.

151304212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36401610.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 151304212121 its reverse (121212403151), we get a palindrome (272516615272).

The spelling of 151304212121 in words is "one hundred fifty-one billion, three hundred four million, two hundred twelve thousand, one hundred twenty-one".