1101100122121 has 4 divisors (see below), whose sum is σ = 1101503310544. Its totient is φ = 1100696933700.

The previous prime is 1101100122113. The next prime is 1101100122151. The reversal of 1101100122121 is 1212210011011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1101100122121 - 2³ = 1101100122113 is a prime.

It is a super-2 number, since 2×1101100122121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1101100122151) 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, 201590115 + ... + 201595576.

It is an arithmetic number, because the mean of its divisors is an integer number (275375827636).

Almost surely, 2^{1101100122121} is an apocalyptic number.

It is an amenable number.

1101100122121 is a deficient number, since it is larger than the sum of its proper divisors (403188423).

1101100122121 is an equidigital number, since it uses as much as digits as its factorization.

1101100122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403188422.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1101100122121 its reverse (1212210011011), we get a palindrome (2313310133132).

It can be divided in two parts, 1101100 and 122121, that added together give a palindrome (1223221).

The spelling of 1101100122121 in words is "one trillion, one hundred one billion, one hundred million, one hundred twenty-two thousand, one hundred twenty-one".