10111220203231 has 6 divisors (see below), whose sum is σ = 11762031665040. Its totient is φ = 8666760174156.

The previous prime is 10111220203229. The next prime is 10111220203291. The reversal of 10111220203231 is 13230202211101.

It is not a de Polignac number, because 10111220203231 - 2¹ = 10111220203229 is a prime.

It is a super-3 number, since 3×10111220203231³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10111220203199 and 10111220203208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10111220203291) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 103175716311 + ... + 103175716408.

It is an arithmetic number, because the mean of its divisors is an integer number (1960338610840).

Almost surely, 2^{10111220203231} is an apocalyptic number.

10111220203231 is a deficient number, since it is larger than the sum of its proper divisors (1650811461809).

10111220203231 is an equidigital number, since it uses as much as digits as its factorization.

10111220203231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206351432733 (or 206351432726 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 10111220203231 its reverse (13230202211101), we get a palindrome (23341422414332).

The spelling of 10111220203231 in words is "ten trillion, one hundred eleven billion, two hundred twenty million, two hundred three thousand, two hundred thirty-one".