121211222322121 has 16 divisors (see below), whose sum is σ = 123546921062400. Its totient is φ = 118877336705088.

The previous prime is 121211222322061. The next prime is 121211222322133. The reversal of 121211222322121 is 121223222112121.

It is a cyclic number.

It is not a de Polignac number, because 121211222322121 - 2¹⁷ = 121211222191049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121211222322821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1481052720 + ... + 1481134558.

It is an arithmetic number, because the mean of its divisors is an integer number (7721682566400).

Almost surely, 2^{121211222322121} is an apocalyptic number.

It is an amenable number.

121211222322121 is a deficient number, since it is larger than the sum of its proper divisors (2335698740279).

121211222322121 is an equidigital number, since it uses as much as digits as its factorization.

121211222322121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92568.

The product of its digits is 768, while the sum is 25.

Adding to 121211222322121 its reverse (121223222112121), we get a palindrome (242434444434242).

The spelling of 121211222322121 in words is "one hundred twenty-one trillion, two hundred eleven billion, two hundred twenty-two million, three hundred twenty-two thousand, one hundred twenty-one".