121221332123 has 8 divisors (see below), whose sum is σ = 126613593600. Its totient is φ = 115839218088.

The previous prime is 121221332087. The next prime is 121221332131. The reversal of 121221332123 is 321233122121.

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 121221332123 - 2⁶ = 121221332059 is a prime.

It is a super-2 number, since 2×121221332123² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121221337123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2512433 + ... + 2560226.

It is an arithmetic number, because the mean of its divisors is an integer number (15826699200).

Almost surely, 2^121221332123 is an apocalyptic number.

121221332123 is a deficient number, since it is larger than the sum of its proper divisors (5392261477).

121221332123 is a wasteful number, since it uses less digits than its factorization.

121221332123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5073721.

The product of its digits is 864, while the sum is 23.

Adding to 121221332123 its reverse (321233122121), we get a palindrome (442454454244).

The spelling of 121221332123 in words is "one hundred twenty-one billion, two hundred twenty-one million, three hundred thirty-two thousand, one hundred twenty-three".