10131211220111 has 4 divisors (see below), whose sum is σ = 10727164821312. Its totient is φ = 9535257618912.

The previous prime is 10131211220107. The next prime is 10131211220129. The reversal of 10131211220111 is 11102211213101.

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 10131211220111 - 2² = 10131211220107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 595953601183 = 10131211220111 / (1 + 0 + 1 + 3 + 1 + 2 + 1 + 1 + 2 + 2 + 0 + 1 + 1 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10131211220111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10131211220171) 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, 297976800575 + ... + 297976800608.

It is an arithmetic number, because the mean of its divisors is an integer number (2681791205328).

Almost surely, 2^{10131211220111} is an apocalyptic number.

10131211220111 is a deficient number, since it is larger than the sum of its proper divisors (595953601201).

10131211220111 is an equidigital number, since it uses as much as digits as its factorization.

10131211220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595953601200.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 10131211220111 its reverse (11102211213101), we get a palindrome (21233422433212).

The spelling of 10131211220111 in words is "ten trillion, one hundred thirty-one billion, two hundred eleven million, two hundred twenty thousand, one hundred eleven".