121227311567 has 4 divisors (see below), whose sum is σ = 125407563720. Its totient is φ = 117047059416.

The previous prime is 121227311551. The next prime is 121227311573. The reversal of 121227311567 is 765113722121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 765113722121 = 7 ⋅109301960303.

It is a cyclic number.

It is not a de Polignac number, because 121227311567 - 2⁴ = 121227311551 is a prime.

It is a super-2 number, since 2×121227311567² (a number of 23 digits) contains 22 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 121227311567.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121227311507) 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, 2090126033 + ... + 2090126090.

It is an arithmetic number, because the mean of its divisors is an integer number (31351890930).

Almost surely, 2^121227311567 is an apocalyptic number.

121227311567 is a deficient number, since it is larger than the sum of its proper divisors (4180252153).

121227311567 is an equidigital number, since it uses as much as digits as its factorization.

121227311567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4180252152.

The product of its digits is 35280, while the sum is 38.

The spelling of 121227311567 in words is "one hundred twenty-one billion, two hundred twenty-seven million, three hundred eleven thousand, five hundred sixty-seven".