121220000202111 has 16 divisors (see below), whose sum is σ = 171784818019584. Its totient is φ = 75770407931264.

The previous prime is 121220000202019. The next prime is 121220000202143. The reversal of 121220000202111 is 111202000022121.

It is a cyclic number.

It is not a de Polignac number, because 121220000202111 - 2¹⁸ = 121219999939967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220000202811) 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, 4518737061 + ... + 4518763886.

It is an arithmetic number, because the mean of its divisors is an integer number (10736551126224).

Almost surely, 2^{121220000202111} is an apocalyptic number.

121220000202111 is a deficient number, since it is larger than the sum of its proper divisors (50564817817473).

121220000202111 is a wasteful number, since it uses less digits than its factorization.

121220000202111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9037501230.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121220000202111 its reverse (111202000022121), we get a palindrome (232422000224232).

The spelling of 121220000202111 in words is "one hundred twenty-one trillion, two hundred twenty billion, two hundred two thousand, one hundred eleven".