121242225631 has 2 divisors, whose sum is σ = 121242225632. Its totient is φ = 121242225630.

The previous prime is 121242225589. The next prime is 121242225641. The reversal of 121242225631 is 136522242121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121242225631 - 2¹⁷ = 121242094559 is a prime.

It is a super-2 number, since 2×121242225631² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121242225593 and 121242225602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121242225641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60621112815 + 60621112816.

It is an arithmetic number, because the mean of its divisors is an integer number (60621112816).

Almost surely, 2^121242225631 is an apocalyptic number.

121242225631 is a deficient number, since it is larger than the sum of its proper divisors (1).

121242225631 is an equidigital number, since it uses as much as digits as its factorization.

121242225631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 31.

Adding to 121242225631 its reverse (136522242121), we get a palindrome (257764467752).

The spelling of 121242225631 in words is "one hundred twenty-one billion, two hundred forty-two million, two hundred twenty-five thousand, six hundred thirty-one".