121201111323 has 16 divisors (see below), whose sum is σ = 179567449600. Its totient is φ = 80796129480.

The previous prime is 121201111267. The next prime is 121201111349. The reversal of 121201111323 is 323111102121.

It is not a de Polignac number, because 121201111323 - 2¹⁴ = 121201094939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121201111296 and 121201111305.

It is not an unprimeable number, because it can be changed into a prime (121201111393) 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, 392178 + ... + 629448.

It is an arithmetic number, because the mean of its divisors is an integer number (11222965600).

Almost surely, 2^121201111323 is an apocalyptic number.

121201111323 is a deficient number, since it is larger than the sum of its proper divisors (58366338277).

121201111323 is a wasteful number, since it uses less digits than its factorization.

121201111323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256199 (or 256193 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 121201111323 its reverse (323111102121), we get a palindrome (444312213444).

The spelling of 121201111323 in words is "one hundred twenty-one billion, two hundred one million, one hundred eleven thousand, three hundred twenty-three".