121001121221 has 8 divisors (see below), whose sum is σ = 128904842304. Its totient is φ = 113184734400.

The previous prime is 121001121191. The next prime is 121001121223. The reversal of 121001121221 is 122121100121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121001121221 - 2¹⁰ = 121001120197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121001121196 and 121001121205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121001121223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21830705 + ... + 21836246.

It is an arithmetic number, because the mean of its divisors is an integer number (16113105288).

Almost surely, 2^121001121221 is an apocalyptic number.

It is an amenable number.

121001121221 is a deficient number, since it is larger than the sum of its proper divisors (7903721083).

121001121221 is a wasteful number, since it uses less digits than its factorization.

121001121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43667131.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121001121221 its reverse (122121100121), we get a palindrome (243122221342).

The spelling of 121001121221 in words is "one hundred twenty-one billion, one million, one hundred twenty-one thousand, two hundred twenty-one".