121674221221 has 4 divisors (see below), whose sum is σ = 139056252832. Its totient is φ = 104292189612.

The previous prime is 121674221197. The next prime is 121674221243. The reversal of 121674221221 is 122122476121.

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: 122122476121 = 3361 ⋅36335161.

It is a cyclic number.

It is not a de Polignac number, because 121674221221 - 2²⁷ = 121540003493 is a prime.

It is a super-2 number, since 2×121674221221² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121674221281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8691015795 + ... + 8691015808.

It is an arithmetic number, because the mean of its divisors is an integer number (34764063208).

Almost surely, 2^121674221221 is an apocalyptic number.

It is an amenable number.

121674221221 is a deficient number, since it is larger than the sum of its proper divisors (17382031611).

121674221221 is an equidigital number, since it uses as much as digits as its factorization.

121674221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17382031610.

The product of its digits is 5376, while the sum is 31.

Adding to 121674221221 its reverse (122122476121), we get a palindrome (243796697342).

The spelling of 121674221221 in words is "one hundred twenty-one billion, six hundred seventy-four million, two hundred twenty-one thousand, two hundred twenty-one".