121001112121 has 4 divisors (see below), whose sum is σ = 121012036992. Its totient is φ = 120990187252.

The previous prime is 121001112101. The next prime is 121001112139. The reversal of 121001112121 is 121211100121.

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 121001112121 - 2⁷ = 121001111993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121001112101) 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, 5445805 + ... + 5467978.

It is an arithmetic number, because the mean of its divisors is an integer number (30253009248).

Almost surely, 2^121001112121 is an apocalyptic number.

It is an amenable number.

121001112121 is a deficient number, since it is larger than the sum of its proper divisors (10924871).

121001112121 is a wasteful number, since it uses less digits than its factorization.

121001112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10924870.

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

Adding to 121001112121 its reverse (121211100121), we get a palindrome (242212212242).

The spelling of 121001112121 in words is "one hundred twenty-one billion, one million, one hundred twelve thousand, one hundred twenty-one".