121223331157 has 2 divisors, whose sum is σ = 121223331158. Its totient is φ = 121223331156.

The previous prime is 121223331109. The next prime is 121223331161. The reversal of 121223331157 is 751133322121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117792417681 + 3430913476 = 343209^2 + 58574^2 .

It is a cyclic number.

It is not a de Polignac number, because 121223331157 - 2⁷ = 121223331029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121223334157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60611665578 + 60611665579.

It is an arithmetic number, because the mean of its divisors is an integer number (60611665579).

Almost surely, 2^121223331157 is an apocalyptic number.

It is an amenable number.

121223331157 is a deficient number, since it is larger than the sum of its proper divisors (1).

121223331157 is an equidigital number, since it uses as much as digits as its factorization.

121223331157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 31.

Adding to 121223331157 its reverse (751133322121), we get a palindrome (872356653278).

The spelling of 121223331157 in words is "one hundred twenty-one billion, two hundred twenty-three million, three hundred thirty-one thousand, one hundred fifty-seven".