121110002121 has 16 divisors (see below), whose sum is σ = 161758376960. Its totient is φ = 80600881680.

The previous prime is 121110002099. The next prime is 121110002129. The reversal of 121110002121 is 121200011121.

It is not a de Polignac number, because 121110002121 - 2¹⁵ = 121109969353 is a prime.

It is a super-2 number, since 2×121110002121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121110002097 and 121110002106.

It is not an unprimeable number, because it can be changed into a prime (121110002129) 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, 11352636 + ... + 11363298.

It is an arithmetic number, because the mean of its divisors is an integer number (10109898560).

Almost surely, 2^121110002121 is an apocalyptic number.

It is an amenable number.

121110002121 is a deficient number, since it is larger than the sum of its proper divisors (40648374839).

121110002121 is a wasteful number, since it uses less digits than its factorization.

121110002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16836.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121110002121 its reverse (121200011121), we get a palindrome (242310013242).

The spelling of 121110002121 in words is "one hundred twenty-one billion, one hundred ten million, two thousand, one hundred twenty-one".