121111111100212 has 24 divisors (see below), whose sum is σ = 213365190032960. Its totient is φ = 60149692670400.

The previous prime is 121111111100201. The next prime is 121111111100227. The reversal of 121111111100212 is 212001111111121.

It is a super-2 number, since 2×121111111100212² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 524262 + ... + 15572317.

Almost surely, 2^{121111111100212} is an apocalyptic number.

It is an amenable number.

121111111100212 is a deficient number, since it is larger than the sum of its proper divisors (92254078932748).

121111111100212 is a wasteful number, since it uses less digits than its factorization.

121111111100212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16109191 (or 16109189 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 121111111100212 its reverse (212001111111121), we get a palindrome (333112222211333).

The spelling of 121111111100212 in words is "one hundred twenty-one trillion, one hundred eleven billion, one hundred eleven million, one hundred thousand, two hundred twelve".