121021102221 has 8 divisors (see below), whose sum is σ = 161486658240. Its totient is φ = 80618140512.

The previous prime is 121021102217. The next prime is 121021102229. The reversal of 121021102221 is 122201120121.

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

It is not a de Polignac number, because 121021102221 - 2² = 121021102217 is a prime.

It is a super-2 number, since 2×121021102221² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121021102221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121021102229) 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, 15644065 + ... + 15651798.

It is an arithmetic number, because the mean of its divisors is an integer number (20185832280).

Almost surely, 2^121021102221 is an apocalyptic number.

It is an amenable number.

121021102221 is a deficient number, since it is larger than the sum of its proper divisors (40465556019).

121021102221 is a wasteful number, since it uses less digits than its factorization.

121021102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31297155.

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

Adding to 121021102221 its reverse (122201120121), we get a palindrome (243222222342).

The spelling of 121021102221 in words is "one hundred twenty-one billion, twenty-one million, one hundred two thousand, two hundred twenty-one".