1200011111131 has 8 divisors (see below), whose sum is σ = 1373215456224. Its totient is φ = 1027250312640.

The previous prime is 1200011111111. The next prime is 1200011111137. The reversal of 1200011111131 is 1311111100021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1200011111131 - 2²⁵ = 1199977556699 is a prime.

It is a super-2 number, since 2×1200011111131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200011111137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110880850 + ... + 110891671.

It is an arithmetic number, because the mean of its divisors is an integer number (171651932028).

Almost surely, 2^{1200011111131} is an apocalyptic number.

1200011111131 is a deficient number, since it is larger than the sum of its proper divisors (173204345093).

1200011111131 is an equidigital number, since it uses as much as digits as its factorization.

1200011111131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221773301.

The product of its (nonzero) digits is 6, while the sum is 13.

Adding to 1200011111131 its reverse (1311111100021), we get a palindrome (2511122211152).

The spelling of 1200011111131 in words is "one trillion, two hundred billion, eleven million, one hundred eleven thousand, one hundred thirty-one".