121111321233 has 20 divisors (see below), whose sum is σ = 188384190448. Its totient is φ = 69206465160.

The previous prime is 121111321231. The next prime is 121111321301. The reversal of 121111321233 is 332123111121.

It is not a de Polignac number, because 121111321233 - 2¹ = 121111321231 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121111321231) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8399803 + ... + 8414208.

Almost surely, 2^121111321233 is an apocalyptic number.

It is an amenable number.

121111321233 is a deficient number, since it is larger than the sum of its proper divisors (67272869215).

121111321233 is an frugal number, since it uses more digits than its factorization.

121111321233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16814042 (or 16814021 counting only the distinct ones).

The product of its digits is 216, while the sum is 21.

Adding to 121111321233 its reverse (332123111121), we get a palindrome (453234432354).

The spelling of 121111321233 in words is "one hundred twenty-one billion, one hundred eleven million, three hundred twenty-one thousand, two hundred thirty-three".