121727223457 has 8 divisors (see below), whose sum is σ = 139120114176. Its totient is φ = 104335154592.

The previous prime is 121727223439. The next prime is 121727223469. The reversal of 121727223457 is 754322727121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121727223457 - 2⁷ = 121727223329 is a prime.

It is a super-2 number, since 2×121727223457² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121727223407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153813 + ... + 516829.

It is an arithmetic number, because the mean of its divisors is an integer number (17390014272).

Almost surely, 2^121727223457 is an apocalyptic number.

It is an amenable number.

121727223457 is a deficient number, since it is larger than the sum of its proper divisors (17392890719).

121727223457 is an equidigital number, since it uses as much as digits as its factorization.

121727223457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410927.

The product of its digits is 329280, while the sum is 43.

The spelling of 121727223457 in words is "one hundred twenty-one billion, seven hundred twenty-seven million, two hundred twenty-three thousand, four hundred fifty-seven".