1201122011111 has 6 divisors (see below), whose sum is σ = 1320241549536. Its totient is φ = 1091929100900.

The previous prime is 1201122011101. The next prime is 1201122011119. The reversal of 1201122011111 is 1111102211021.

It is not a de Polignac number, because 1201122011111 - 2²² = 1201117816807 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 (1201122011119) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4963313975 + ... + 4963314216.

It is an arithmetic number, because the mean of its divisors is an integer number (220040258256).

Almost surely, 2^{1201122011111} is an apocalyptic number.

1201122011111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1201122011111 is a deficient number, since it is larger than the sum of its proper divisors (119119538425).

1201122011111 is an equidigital number, since it uses as much as digits as its factorization.

1201122011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9926628213 (or 9926628202 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1201122011111 its reverse (1111102211021), we get a palindrome (2312224222132).

The spelling of 1201122011111 in words is "one trillion, two hundred one billion, one hundred twenty-two million, eleven thousand, one hundred eleven".