121220111221101 has 48 divisors (see below), whose sum is σ = 177356726651520. Its totient is φ = 79774724937600.

The previous prime is 121220111221073. The next prime is 121220111221103. The reversal of 121220111221101 is 101122111022121.

It is a happy number.

121220111221101 is a `hidden beast` number, since 1 + 212 + 20 + 111 + 221 + 101 = 666.

It is not a de Polignac number, because 121220111221101 - 2²⁷ = 121219977003373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220111221103) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1797071091 + ... + 1797138543.

It is an arithmetic number, because the mean of its divisors is an integer number (3694931805240).

Almost surely, 2^{121220111221101} is an apocalyptic number.

It is an amenable number.

121220111221101 is a deficient number, since it is larger than the sum of its proper divisors (56136615430419).

121220111221101 is a wasteful number, since it uses less digits than its factorization.

121220111221101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73426 (or 73423 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 121220111221101 its reverse (101122111022121), we get a palindrome (222342222243222).

The spelling of 121220111221101 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred eleven million, two hundred twenty-one thousand, one hundred one".