1201000022111 has 4 divisors (see below), whose sum is σ = 1205274043824. Its totient is φ = 1196726000400.

The previous prime is 1201000022087. The next prime is 1201000022191. The reversal of 1201000022111 is 1112200001021.

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 1201000022111 - 2³⁴ = 1183820152927 is a prime.

It is a super-2 number, since 2×1201000022111² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201000022092 and 1201000022101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201000022191) 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, 2137010435 + ... + 2137010996.

It is an arithmetic number, because the mean of its divisors is an integer number (301318510956).

Almost surely, 2^{1201000022111} is an apocalyptic number.

1201000022111 is a deficient number, since it is larger than the sum of its proper divisors (4274021713).

1201000022111 is an equidigital number, since it uses as much as digits as its factorization.

1201000022111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4274021712.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1201000022111 its reverse (1112200001021), we get a palindrome (2313200023132).

The spelling of 1201000022111 in words is "one trillion, two hundred one billion, twenty-two thousand, one hundred eleven".