121731227 has 2 divisors, whose sum is σ = 121731228. Its totient is φ = 121731226.

The previous prime is 121731193. The next prime is 121731257. The reversal of 121731227 is 722137121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121731227 - 2⁶ = 121731163 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 121731196 and 121731205.

It is not a weakly prime, because it can be changed into another prime (121731257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60865613 + 60865614.

It is an arithmetic number, because the mean of its divisors is an integer number (60865614).

Almost surely, 2^121731227 is an apocalyptic number.

121731227 is a deficient number, since it is larger than the sum of its proper divisors (1).

121731227 is an equidigital number, since it uses as much as digits as its factorization.

121731227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1176, while the sum is 26.

The square root of 121731227 is about 11033.1875267304. The cubic root of 121731227 is about 495.6030835922.

Adding to 121731227 its reverse (722137121), we get a palindrome (843868348).

The spelling of 121731227 in words is "one hundred twenty-one million, seven hundred thirty-one thousand, two hundred twenty-seven".