121222112121201 has 128 divisors (see below), whose sum is σ = 206749394611200. Its totient is φ = 61469864755200.

The previous prime is 121222112121179. The next prime is 121222112121221. The reversal of 121222112121201 is 102121211222121.

It is not a de Polignac number, because 121222112121201 - 2⁵ = 121222112121169 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (121222112121221) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1266627651 + ... + 1266723351.

It is an arithmetic number, because the mean of its divisors is an integer number (1615229645400).

Almost surely, 2^{121222112121201} is an apocalyptic number.

It is an amenable number.

121222112121201 is a deficient number, since it is larger than the sum of its proper divisors (85527282489999).

121222112121201 is a wasteful number, since it uses less digits than its factorization.

121222112121201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97259.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 121222112121201 its reverse (102121211222121), we get a palindrome (223343323343322).

The spelling of 121222112121201 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, one hundred twelve million, one hundred twenty-one thousand, two hundred one".