121222120202111 has 4 divisors (see below), whose sum is σ = 121264639363224. Its totient is φ = 121179601041000.

The previous prime is 121222120201999. The next prime is 121222120202119. The reversal of 121222120202111 is 111202021222121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121222120202111 - 2²⁶ = 121222053093247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121222120202119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21259576280 + ... + 21259581981.

It is an arithmetic number, because the mean of its divisors is an integer number (30316159840806).

Almost surely, 2^{121222120202111} is an apocalyptic number.

121222120202111 is a deficient number, since it is larger than the sum of its proper divisors (42519161113).

121222120202111 is an equidigital number, since it uses as much as digits as its factorization.

121222120202111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42519161112.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 121222120202111 its reverse (111202021222121), we get a palindrome (232424141424232).

The spelling of 121222120202111 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, one hundred twenty million, two hundred two thousand, one hundred eleven".