1201220110121 has 16 divisors (see below), whose sum is σ = 1265684266560. Its totient is φ = 1136880722880.

The previous prime is 1201220110081. The next prime is 1201220110127. The reversal of 1201220110121 is 1210110221021.

It is not a de Polignac number, because 1201220110121 - 2¹⁴ = 1201220093737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201220110096 and 1201220110105.

It is not an unprimeable number, because it can be changed into a prime (1201220110127) 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, 117634706 + ... + 117644916.

It is an arithmetic number, because the mean of its divisors is an integer number (79105266660).

Almost surely, 2^{1201220110121} is an apocalyptic number.

It is an amenable number.

1201220110121 is a deficient number, since it is larger than the sum of its proper divisors (64464156439).

1201220110121 is a wasteful number, since it uses less digits than its factorization.

1201220110121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15704.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1201220110121 its reverse (1210110221021), we get a palindrome (2411330331142).

The spelling of 1201220110121 in words is "one trillion, two hundred one billion, two hundred twenty million, one hundred ten thousand, one hundred twenty-one".