121100001120221 has 16 divisors (see below), whose sum is σ = 122238094835376. Its totient is φ = 119966579905536.

The previous prime is 121100001120191. The next prime is 121100001120227. The reversal of 121100001120221 is 122021100001121.

It can be written as a sum of positive squares in 8 ways, for example, as 7633831917721 + 113466169202500 = 2762939^2 + 10652050^2 .

It is a cyclic number.

It is not a de Polignac number, because 121100001120221 - 2¹⁸ = 121100000858077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121100001120196 and 121100001120205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121100001120227) 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, 2376488075 + ... + 2376539031.

It is an arithmetic number, because the mean of its divisors is an integer number (7639880927211).

Almost surely, 2^{121100001120221} is an apocalyptic number.

It is an amenable number.

121100001120221 is a deficient number, since it is larger than the sum of its proper divisors (1138093715155).

121100001120221 is a wasteful number, since it uses less digits than its factorization.

121100001120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96368.

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

Adding to 121100001120221 its reverse (122021100001121), we get a palindrome (243121101121342).

The spelling of 121100001120221 in words is "one hundred twenty-one trillion, one hundred billion, one million, one hundred twenty thousand, two hundred twenty-one".