121103431 has 2 divisors, whose sum is σ = 121103432. Its totient is φ = 121103430.

The previous prime is 121103419. The next prime is 121103467. The reversal of 121103431 is 134301121.

It is a weak prime.

It is an emirp because it is prime and its reverse (134301121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121103431 - 2¹³ = 121095239 is a prime.

It is a super-2 number, since 2×121103431² = 29332081999943522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121103401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60551715 + 60551716.

It is an arithmetic number, because the mean of its divisors is an integer number (60551716).

Almost surely, 2^121103431 is an apocalyptic number.

121103431 is a deficient number, since it is larger than the sum of its proper divisors (1).

121103431 is an equidigital number, since it uses as much as digits as its factorization.

121103431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 121103431 is about 11004.7004048270. The cubic root of 121103431 is about 494.7496349787.

Adding to 121103431 its reverse (134301121), we get a palindrome (255404552).

The spelling of 121103431 in words is "one hundred twenty-one million, one hundred three thousand, four hundred thirty-one".