121200111220011 has 16 divisors (see below), whose sum is σ = 161650418654208. Its totient is φ = 80774942623200.

The previous prime is 121200111220009. The next prime is 121200111220049. The reversal of 121200111220011 is 110022111002121.

It is a happy number.

It is not a de Polignac number, because 121200111220011 - 2¹ = 121200111220009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121200111220061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134167116 + ... + 135067446.

It is an arithmetic number, because the mean of its divisors is an integer number (10103151165888).

Almost surely, 2^{121200111220011} is an apocalyptic number.

121200111220011 is a deficient number, since it is larger than the sum of its proper divisors (40450307434197).

121200111220011 is an equidigital number, since it uses as much as digits as its factorization.

121200111220011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914242.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121200111220011 its reverse (110022111002121), we get a palindrome (231222222222132).

The spelling of 121200111220011 in words is "one hundred twenty-one trillion, two hundred billion, one hundred eleven million, two hundred twenty thousand, eleven".