121220202022111 has 4 divisors (see below), whose sum is σ = 123799355256672. Its totient is φ = 118641048787552.

The previous prime is 121220202022103. The next prime is 121220202022189. The reversal of 121220202022111 is 111220202022121.

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 121220202022111 - 2³ = 121220202022103 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 (121220202022811) 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, 1289576617210 + ... + 1289576617303.

It is an arithmetic number, because the mean of its divisors is an integer number (30949838814168).

Almost surely, 2^{121220202022111} is an apocalyptic number.

121220202022111 is a deficient number, since it is larger than the sum of its proper divisors (2579153234561).

121220202022111 is an equidigital number, since it uses as much as digits as its factorization.

121220202022111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2579153234560.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 121220202022111 its reverse (111220202022121), we get a palindrome (232440404044232).

The spelling of 121220202022111 in words is "one hundred twenty-one trillion, two hundred twenty billion, two hundred two million, twenty-two thousand, one hundred eleven".