121201220013111 has 48 divisors (see below), whose sum is σ = 217573119077184. Its totient is φ = 63422123738112.

The previous prime is 121201220013079. The next prime is 121201220013119. The reversal of 121201220013111 is 111310022102121.

It is a happy number.

121201220013111 is a `hidden beast` number, since 12 + 120 + 1 + 220 + 0 + 1 + 311 + 1 = 666.

It is not a de Polignac number, because 121201220013111 - 2⁵ = 121201220013079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121201220013119) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1529236120 + ... + 1529315373.

It is an arithmetic number, because the mean of its divisors is an integer number (4532773314108).

Almost surely, 2^{121201220013111} is an apocalyptic number.

121201220013111 is a deficient number, since it is larger than the sum of its proper divisors (96371899064073).

121201220013111 is a wasteful number, since it uses less digits than its factorization.

121201220013111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3058551560 (or 3058551557 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 121201220013111 its reverse (111310022102121), we get a palindrome (232511242115232).

The spelling of 121201220013111 in words is "one hundred twenty-one trillion, two hundred one billion, two hundred twenty million, thirteen thousand, one hundred eleven".