20111201031 has 8 divisors (see below), whose sum is σ = 26823888000. Its totient is φ = 13402990712.

The previous prime is 20111201029. The next prime is 20111201053. The reversal of 20111201031 is 13010211102.

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 20111201031 - 2¹ = 20111201029 is a prime.

It is a super-2 number, since 2×20111201031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20111200998 and 20111201016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111201531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1108665 + ... + 1126658.

It is an arithmetic number, because the mean of its divisors is an integer number (3352986000).

Almost surely, 2^20111201031 is an apocalyptic number.

20111201031 is a deficient number, since it is larger than the sum of its proper divisors (6712686969).

20111201031 is a wasteful number, since it uses less digits than its factorization.

20111201031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2238325.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 20111201031 its reverse (13010211102), we get a palindrome (33121412133).

The spelling of 20111201031 in words is "twenty billion, one hundred eleven million, two hundred one thousand, thirty-one".