121332211221 has 16 divisors (see below), whose sum is σ = 174298134080. Its totient is φ = 74632752000.

The previous prime is 121332211219. The next prime is 121332211271. The reversal of 121332211221 is 122112233121.

It is not a de Polignac number, because 121332211221 - 2¹ = 121332211219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121332211201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 603256 + ... + 778833.

It is an arithmetic number, because the mean of its divisors is an integer number (10893633380).

Almost surely, 2^121332211221 is an apocalyptic number.

It is an amenable number.

121332211221 is a deficient number, since it is larger than the sum of its proper divisors (52965922859).

121332211221 is a wasteful number, since it uses less digits than its factorization.

121332211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1384356.

The product of its digits is 288, while the sum is 21.

Adding to 121332211221 its reverse (122112233121), we get a palindrome (243444444342).

The spelling of 121332211221 in words is "one hundred twenty-one billion, three hundred thirty-two million, two hundred eleven thousand, two hundred twenty-one".