121221133023 has 8 divisors (see below), whose sum is σ = 161682738048. Its totient is φ = 80786808344.

The previous prime is 121221133003. The next prime is 121221133037. The reversal of 121221133023 is 320331122121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121221133023 - 2¹³ = 121221124831 is a prime.

It is a super-2 number, since 2×121221133023² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221133003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6809715 + ... + 6827492.

It is an arithmetic number, because the mean of its divisors is an integer number (20210342256).

Almost surely, 2^121221133023 is an apocalyptic number.

121221133023 is a deficient number, since it is larger than the sum of its proper divisors (40461605025).

121221133023 is a wasteful number, since it uses less digits than its factorization.

121221133023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13640173.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 121221133023 its reverse (320331122121), we get a palindrome (441552255144).

The spelling of 121221133023 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred thirty-three thousand, twenty-three".