111212120121202 has 4 divisors (see below), whose sum is σ = 166818180181806. Its totient is φ = 55606060060600.

The previous prime is 111212120121143. The next prime is 111212120121211. The reversal of 111212120121202 is 202121021212111.

It is a happy number.

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., 72638443706761 + 38573676414441 = 8522819^2 + 6210771^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 111212120121202.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27803030030299 + ... + 27803030030302.

Almost surely, 2^{111212120121202} is an apocalyptic number.

111212120121202 is a deficient number, since it is larger than the sum of its proper divisors (55606060060604).

111212120121202 is an equidigital number, since it uses as much as digits as its factorization.

111212120121202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55606060060603.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 111212120121202 its reverse (202121021212111), we get a palindrome (313333141333313).

The spelling of 111212120121202 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred twenty million, one hundred twenty-one thousand, two hundred two".