121101222121 has 16 divisors (see below), whose sum is σ = 139403306880. Its totient is φ = 104122184320.

The previous prime is 121101222071. The next prime is 121101222149. The reversal of 121101222121 is 121222101121.

It is not a de Polignac number, because 121101222121 - 2⁹ = 121101221609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121101222095 and 121101222104.

It is not an unprimeable number, because it can be changed into a prime (121101222181) 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, 2666590 + ... + 2711623.

It is an arithmetic number, because the mean of its divisors is an integer number (8712706680).

Almost surely, 2^121101222121 is an apocalyptic number.

121101222121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121101222121 is a deficient number, since it is larger than the sum of its proper divisors (18302084759).

121101222121 is a wasteful number, since it uses less digits than its factorization.

121101222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5378336.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121101222121 its reverse (121222101121), we get a palindrome (242323323242).

The spelling of 121101222121 in words is "one hundred twenty-one billion, one hundred one million, two hundred twenty-two thousand, one hundred twenty-one".