121221000221122 has 4 divisors (see below), whose sum is σ = 181831500331686. Its totient is φ = 60610500110560.

The previous prime is 121221000221119. The next prime is 121221000221149. The reversal of 121221000221122 is 221122000122121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 64340307180081 + 56880693041041 = 8021241^2 + 7541929^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 121221000221122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30305250055279 + ... + 30305250055282.

Almost surely, 2^{121221000221122} is an apocalyptic number.

121221000221122 is a deficient number, since it is larger than the sum of its proper divisors (60610500110564).

121221000221122 is an equidigital number, since it uses as much as digits as its factorization.

121221000221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60610500110563.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 121221000221122 its reverse (221122000122121), we get a palindrome (342343000343243).

Subtracting 121221000221122 from its reverse (221122000122121), we obtain a palindrome (99900999900999).

The spelling of 121221000221122 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred twenty-one thousand, one hundred twenty-two".