121201012120111 has 48 divisors (see below), whose sum is σ = 161255840219712. Its totient is φ = 88860835261440.

The previous prime is 121201012120093. The next prime is 121201012120207. The reversal of 121201012120111 is 111021210102121.

It is not a de Polignac number, because 121201012120111 - 2¹¹ = 121201012118063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121201012126111) 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, 47910661 + ... + 50376913.

It is an arithmetic number, because the mean of its divisors is an integer number (3359496671244).

Almost surely, 2^{121201012120111} is an apocalyptic number.

121201012120111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121201012120111 is a deficient number, since it is larger than the sum of its proper divisors (40054828099601).

121201012120111 is a wasteful number, since it uses less digits than its factorization.

121201012120111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2469712 (or 2469701 counting only the distinct ones).

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

Adding to 121201012120111 its reverse (111021210102121), we get a palindrome (232222222222232).

The spelling of 121201012120111 in words is "one hundred twenty-one trillion, two hundred one billion, twelve million, one hundred twenty thousand, one hundred eleven".