121201221001111 has 8 divisors (see below), whose sum is σ = 124170290846784. Its totient is φ = 118257419835360.

The previous prime is 121201221001109. The next prime is 121201221001121. The reversal of 121201221001111 is 111100122102121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121201221001111 - 2¹ = 121201221001109 is a prime.

It is a super-2 number, since 2×121201221001111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121201221001121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6317160271 + ... + 6317179456.

It is an arithmetic number, because the mean of its divisors is an integer number (15521286355848).

Almost surely, 2^{121201221001111} is an apocalyptic number.

121201221001111 is a deficient number, since it is larger than the sum of its proper divisors (2969069845673).

121201221001111 is a wasteful number, since it uses less digits than its factorization.

121201221001111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12634339961.

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

Adding to 121201221001111 its reverse (111100122102121), we get a palindrome (232301343103232).

The spelling of 121201221001111 in words is "one hundred twenty-one trillion, two hundred one billion, two hundred twenty-one million, one thousand, one hundred eleven".