121132213223221 has 16 divisors (see below), whose sum is σ = 127269118391040. Its totient is φ = 115068232540800.

The previous prime is 121132213223209. The next prime is 121132213223261. The reversal of 121132213223221 is 122322312231121.

It is a cyclic number.

It is not a de Polignac number, because 121132213223221 - 2³⁷ = 120994774269749 is a prime.

It is a super-2 number, since 2×121132213223221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121132213223221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121132213223261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8762275 + ... + 17861743.

It is an arithmetic number, because the mean of its divisors is an integer number (7954319899440).

Almost surely, 2^{121132213223221} is an apocalyptic number.

It is an amenable number.

121132213223221 is a deficient number, since it is larger than the sum of its proper divisors (6136905167819).

121132213223221 is a wasteful number, since it uses less digits than its factorization.

121132213223221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9103476.

The product of its digits is 3456, while the sum is 28.

Adding to 121132213223221 its reverse (122322312231121), we get a palindrome (243454525454342).

The spelling of 121132213223221 in words is "one hundred twenty-one trillion, one hundred thirty-two billion, two hundred thirteen million, two hundred twenty-three thousand, two hundred twenty-one".