242122253357 has 4 divisors (see below), whose sum is σ = 242171162016. Its totient is φ = 242073344700.

The previous prime is 242122253353. The next prime is 242122253363. The reversal of 242122253357 is 753352221242.

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, and also an emirpimes, since its reverse is a distinct semiprime: 753352221242 = 2 ⋅376676110621.

It is a cyclic number.

It is not a de Polignac number, because 242122253357 - 2² = 242122253353 is a prime.

It is a super-3 number, since 3×242122253357³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 242122253357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242122253353) 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, 24446903 + ... + 24456804.

It is an arithmetic number, because the mean of its divisors is an integer number (60542790504).

Almost surely, 2^242122253357 is an apocalyptic number.

It is an amenable number.

242122253357 is a deficient number, since it is larger than the sum of its proper divisors (48908659).

242122253357 is an equidigital number, since it uses as much as digits as its factorization.

242122253357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48908658.

The product of its digits is 201600, while the sum is 38.

Adding to 242122253357 its reverse (753352221242), we get a palindrome (995474474599).

The spelling of 242122253357 in words is "two hundred forty-two billion, one hundred twenty-two million, two hundred fifty-three thousand, three hundred fifty-seven".