151221351251 has 4 divisors (see below), whose sum is σ = 160116724872. Its totient is φ = 142325977632.

The previous prime is 151221351247. The next prime is 151221351331. The reversal of 151221351251 is 152153122151.

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

It is a cyclic number.

It is not a de Polignac number, because 151221351251 - 2² = 151221351247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (151221351221) 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, 4447686785 + ... + 4447686818.

It is an arithmetic number, because the mean of its divisors is an integer number (40029181218).

Almost surely, 2^151221351251 is an apocalyptic number.

151221351251 is a deficient number, since it is larger than the sum of its proper divisors (8895373621).

151221351251 is an equidigital number, since it uses as much as digits as its factorization.

151221351251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8895373620.

The product of its digits is 3000, while the sum is 29.

The spelling of 151221351251 in words is "one hundred fifty-one billion, two hundred twenty-one million, three hundred fifty-one thousand, two hundred fifty-one".