151202100721 has 4 divisors (see below), whose sum is σ = 172802400832. Its totient is φ = 129601800612.

The previous prime is 151202100691. The next prime is 151202100733. The reversal of 151202100721 is 127001202151.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 151202100721 - 2⁹ = 151202100209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 151202100692 and 151202100701.

It is not an unprimeable number, because it can be changed into a prime (151202100421) 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, 10800150045 + ... + 10800150058.

It is an arithmetic number, because the mean of its divisors is an integer number (43200600208).

Almost surely, 2^151202100721 is an apocalyptic number.

It is an amenable number.

151202100721 is a deficient number, since it is larger than the sum of its proper divisors (21600300111).

151202100721 is an equidigital number, since it uses as much as digits as its factorization.

151202100721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21600300110.

The product of its (nonzero) digits is 280, while the sum is 22.

Adding to 151202100721 its reverse (127001202151), we get a palindrome (278203302872).

The spelling of 151202100721 in words is "one hundred fifty-one billion, two hundred two million, one hundred thousand, seven hundred twenty-one".