157522221121 has 4 divisors (see below), whose sum is σ = 158268772144. Its totient is φ = 156775670100.

The previous prime is 157522221097. The next prime is 157522221251. The reversal of 157522221121 is 121122225751.

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 157522221121 - 2⁷ = 157522220993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157522221821) 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, 373275195 + ... + 373275616.

It is an arithmetic number, because the mean of its divisors is an integer number (39567193036).

Almost surely, 2^157522221121 is an apocalyptic number.

It is an amenable number.

157522221121 is a deficient number, since it is larger than the sum of its proper divisors (746551023).

157522221121 is an equidigital number, since it uses as much as digits as its factorization.

157522221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746551022.

The product of its digits is 5600, while the sum is 31.

Adding to 157522221121 its reverse (121122225751), we get a palindrome (278644446872).

The spelling of 157522221121 in words is "one hundred fifty-seven billion, five hundred twenty-two million, two hundred twenty-one thousand, one hundred twenty-one".