121101010123 has 16 divisors (see below), whose sum is σ = 126224857440. Its totient is φ = 116101472256.

The previous prime is 121101010109. The next prime is 121101010159. The reversal of 121101010123 is 321010101121.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121101010123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121101010193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 408811 + ... + 639787.

It is an arithmetic number, because the mean of its divisors is an integer number (7889053590).

Almost surely, 2^121101010123 is an apocalyptic number.

121101010123 is a deficient number, since it is larger than the sum of its proper divisors (5123847317).

121101010123 is a wasteful number, since it uses less digits than its factorization.

121101010123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231246.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 121101010123 its reverse (321010101121), we get a palindrome (442111111244).

The spelling of 121101010123 in words is "one hundred twenty-one billion, one hundred one million, ten thousand, one hundred twenty-three".