121123310311221 has 8 divisors (see below), whose sum is σ = 161498893596480. Its totient is φ = 80748300283392.

The previous prime is 121123310311181. The next prime is 121123310311253. The reversal of 121123310311221 is 122113013321121.

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

It is not a de Polignac number, because 121123310311221 - 2²⁵ = 121123276756789 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121123310311191 and 121123310311200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121123310311261) 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, 142821105 + ... + 143666678.

It is an arithmetic number, because the mean of its divisors is an integer number (20187361699560).

Almost surely, 2^{121123310311221} is an apocalyptic number.

It is an amenable number.

121123310311221 is a deficient number, since it is larger than the sum of its proper divisors (40375583285259).

121123310311221 is a wasteful number, since it uses less digits than its factorization.

121123310311221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286628715.

The product of its (nonzero) digits is 432, while the sum is 24.

Adding to 121123310311221 its reverse (122113013321121), we get a palindrome (243236323632342).

The spelling of 121123310311221 in words is "one hundred twenty-one trillion, one hundred twenty-three billion, three hundred ten million, three hundred eleven thousand, two hundred twenty-one".