121211112122 has 4 divisors (see below), whose sum is σ = 181816668186. Its totient is φ = 60605556060.

The previous prime is 121211112103. The next prime is 121211112133. The reversal of 121211112122 is 221211112121.

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., 82858198201 + 38352913921 = 287851^2 + 195839^2 .

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 121211112122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30302778029 + ... + 30302778032.

Almost surely, 2^121211112122 is an apocalyptic number.

121211112122 is a deficient number, since it is larger than the sum of its proper divisors (60605556064).

121211112122 is an equidigital number, since it uses as much as digits as its factorization.

121211112122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60605556063.

The product of its digits is 32, while the sum is 17.

Adding to 121211112122 its reverse (221211112121), we get a palindrome (342422224243).

Subtracting 121211112122 from its reverse (221211112121), we obtain a palindrome (99999999999).

The spelling of 121211112122 in words is "one hundred twenty-one billion, two hundred eleven million, one hundred twelve thousand, one hundred twenty-two".