121002221100121 has 4 divisors (see below), whose sum is σ = 121002377052544. Its totient is φ = 121002065147700.

The previous prime is 121002221100031. The next prime is 121002221100161. The reversal of 121002221100121 is 121001122200121.

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 121002221100121 - 2¹⁵ = 121002221067353 is a prime.

It is a super-2 number, since 2×121002221100121² (a number of 29 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 = 121002221100095 and 121002221100104.

It is not an unprimeable number, because it can be changed into a prime (121002221100161) 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, 76806525 + ... + 78366106.

It is an arithmetic number, because the mean of its divisors is an integer number (30250594263136).

Almost surely, 2^{121002221100121} is an apocalyptic number.

It is an amenable number.

121002221100121 is a deficient number, since it is larger than the sum of its proper divisors (155952423).

121002221100121 is an equidigital number, since it uses as much as digits as its factorization.

121002221100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155952422.

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

Adding to 121002221100121 its reverse (121001122200121), we get a palindrome (242003343300242).

The spelling of 121002221100121 in words is "one hundred twenty-one trillion, two billion, two hundred twenty-one million, one hundred thousand, one hundred twenty-one".