121023311321 has 32 divisors (see below), whose sum is σ = 143280627840. Its totient is φ = 100967731200.

The previous prime is 121023311263. The next prime is 121023311327. The reversal of 121023311321 is 123113320121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121023311321 - 2¹⁴ = 121023294937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121023311293 and 121023311302.

It is not an unprimeable number, because it can be changed into a prime (121023311327) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19463405 + ... + 19469621.

It is an arithmetic number, because the mean of its divisors is an integer number (4477519620).

Almost surely, 2^121023311321 is an apocalyptic number.

121023311321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121023311321 is a deficient number, since it is larger than the sum of its proper divisors (22257316519).

121023311321 is a wasteful number, since it uses less digits than its factorization.

121023311321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8825.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 121023311321 its reverse (123113320121), we get a palindrome (244136631442).

The spelling of 121023311321 in words is "one hundred twenty-one billion, twenty-three million, three hundred eleven thousand, three hundred twenty-one".