121002212221 has 8 divisors (see below), whose sum is σ = 132005894688. Its totient is φ = 109999110000.

The previous prime is 121002212159. The next prime is 121002212249. The reversal of 121002212221 is 122212200121.

It is a happy number.

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 121002212221 - 2²⁹ = 120465341309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121002212195 and 121002212204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121002212521) 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, 370731 + ... + 615991.

It is an arithmetic number, because the mean of its divisors is an integer number (16500736836).

Almost surely, 2^121002212221 is an apocalyptic number.

121002212221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121002212221 is a deficient number, since it is larger than the sum of its proper divisors (11003682467).

121002212221 is a wasteful number, since it uses less digits than its factorization.

121002212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290123.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121002212221 its reverse (122212200121), we get a palindrome (243214412342).

The spelling of 121002212221 in words is "one hundred twenty-one billion, two million, two hundred twelve thousand, two hundred twenty-one".