121201310111 has 8 divisors (see below), whose sum is σ = 142984034304. Its totient is φ = 100535648760.

The previous prime is 121201310101. The next prime is 121201310179. The reversal of 121201310111 is 111013102121.

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 121201310111 - 2⁶ = 121201310047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121201310101) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 279265475 + ... + 279265908.

It is an arithmetic number, because the mean of its divisors is an integer number (17873004288).

Almost surely, 2^121201310111 is an apocalyptic number.

121201310111 is a deficient number, since it is larger than the sum of its proper divisors (21782724193).

121201310111 is an equidigital number, since it uses as much as digits as its factorization.

121201310111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558531421.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 121201310111 its reverse (111013102121), we get a palindrome (232214412232).

It can be divided in two parts, 12120 and 1310111, that added together give a palindrome (1322231).

The spelling of 121201310111 in words is "one hundred twenty-one billion, two hundred one million, three hundred ten thousand, one hundred eleven".