121102021221 has 8 divisors (see below), whose sum is σ = 161895403680. Its totient is φ = 80521659792.

The previous prime is 121102021177. The next prime is 121102021259. The reversal of 121102021221 is 122120201121.

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

It is not a de Polignac number, because 121102021221 - 2¹⁰ = 121102020197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121102021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121102021021) 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, 53253930 + ... + 53256203.

It is an arithmetic number, because the mean of its divisors is an integer number (20236925460).

Almost surely, 2^121102021221 is an apocalyptic number.

It is an amenable number.

121102021221 is a deficient number, since it is larger than the sum of its proper divisors (40793382459).

121102021221 is a wasteful number, since it uses less digits than its factorization.

121102021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106510515.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121102021221 its reverse (122120201121), we get a palindrome (243222222342).

The spelling of 121102021221 in words is "one hundred twenty-one billion, one hundred two million, twenty-one thousand, two hundred twenty-one".