1201012111111 has 4 divisors (see below), whose sum is σ = 1204640546824. Its totient is φ = 1197383675400.

The previous prime is 1201012111109. The next prime is 1201012111133. The reversal of 1201012111111 is 1111112101021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1201012111111 - 2¹ = 1201012111109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201012111091 and 1201012111100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201012111181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1814217360 + ... + 1814218021.

It is an arithmetic number, because the mean of its divisors is an integer number (301160136706).

Almost surely, 2^{1201012111111} is an apocalyptic number.

1201012111111 is a deficient number, since it is larger than the sum of its proper divisors (3628435713).

1201012111111 is an equidigital number, since it uses as much as digits as its factorization.

1201012111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3628435712.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 1201012111111 its reverse (1111112101021), we get a palindrome (2312124212132).

The spelling of 1201012111111 in words is "one trillion, two hundred one billion, twelve million, one hundred eleven thousand, one hundred eleven".