121155231103 has 2 divisors, whose sum is σ = 121155231104. Its totient is φ = 121155231102.

The previous prime is 121155231047. The next prime is 121155231137. The reversal of 121155231103 is 301132551121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121155231103 - 2¹³ = 121155222911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121155231803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60577615551 + 60577615552.

It is an arithmetic number, because the mean of its divisors is an integer number (60577615552).

Almost surely, 2^121155231103 is an apocalyptic number.

121155231103 is a deficient number, since it is larger than the sum of its proper divisors (1).

121155231103 is an equidigital number, since it uses as much as digits as its factorization.

121155231103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 25.

Adding to 121155231103 its reverse (301132551121), we get a palindrome (422287782224).

The spelling of 121155231103 in words is "one hundred twenty-one billion, one hundred fifty-five million, two hundred thirty-one thousand, one hundred three".