121001113123 has 16 divisors (see below), whose sum is σ = 133465483872. Its totient is φ = 108783360000.

The previous prime is 121001113117. The next prime is 121001113153. The reversal of 121001113123 is 321311100121.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121001113123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121001113097 and 121001113106.

It is not an unprimeable number, because it can be changed into a prime (121001113153) 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, 883843 + ... + 1011523.

It is an arithmetic number, because the mean of its divisors is an integer number (8341592742).

Almost surely, 2^121001113123 is an apocalyptic number.

121001113123 is a deficient number, since it is larger than the sum of its proper divisors (12464370749).

121001113123 is a wasteful number, since it uses less digits than its factorization.

121001113123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128646.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 121001113123 its reverse (321311100121), we get a palindrome (442312213244).

The spelling of 121001113123 in words is "one hundred twenty-one billion, one million, one hundred thirteen thousand, one hundred twenty-three".