1201202111 has 4 divisors (see below), whose sum is σ = 1206895224. Its totient is φ = 1195509000.

The previous prime is 1201202087. The next prime is 1201202147. The reversal of 1201202111 is 1112021021.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201202111 is a prime.

It is a super-2 number, since 2×1201202111² = 2885773022941712642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201202092 and 1201202101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201202411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2846240 + ... + 2846661.

It is an arithmetic number, because the mean of its divisors is an integer number (301723806).

Almost surely, 2^1201202111 is an apocalyptic number.

1201202111 is a deficient number, since it is larger than the sum of its proper divisors (5693113).

1201202111 is an equidigital number, since it uses as much as digits as its factorization.

1201202111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5693112.

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

The square root of 1201202111 is about 34658.3627859136. The cubic root of 1201202111 is about 1063.0132934138.

Adding to 1201202111 its reverse (1112021021), we get a palindrome (2313223132).

The spelling of 1201202111 in words is "one billion, two hundred one million, two hundred two thousand, one hundred eleven".