121111111210010 has 32 divisors (see below), whose sum is σ = 218269851584400. Its totient is φ = 48384488282112.

The previous prime is 121111111209929. The next prime is 121111111210021. The reversal of 121111111210010 is 10012111111121.

It can be written as a sum of positive squares in 8 ways, for example, as 61818292976521 + 59292818233489 = 7862461^2 + 7700183^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89987516 + ... + 91323464.

Almost surely, 2^{121111111210010} is an apocalyptic number.

121111111210010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121111111210010 is a deficient number, since it is larger than the sum of its proper divisors (97158740374390).

121111111210010 is a wasteful number, since it uses less digits than its factorization.

121111111210010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347170.

The product of its (nonzero) digits is 4, while the sum is 14.

Adding to 121111111210010 its reverse (10012111111121), we get a palindrome (131123222321131).

The spelling of 121111111210010 in words is "one hundred twenty-one trillion, one hundred eleven billion, one hundred eleven million, two hundred ten thousand, ten".