2111001031031 has 4 divisors (see below), whose sum is σ = 2111021610792. Its totient is φ = 2110980451272.

The previous prime is 2111001031001. The next prime is 2111001031103. The reversal of 2111001031031 is 1301301001112.

It is a happy number.

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-2111001031031 is a prime.

It is a super-2 number, since 2×2111001031031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111001030997 and 2111001031015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111001031001) 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, 10135241 + ... + 10341426.

It is an arithmetic number, because the mean of its divisors is an integer number (527755402698).

Almost surely, 2^{2111001031031} is an apocalyptic number.

2111001031031 is a deficient number, since it is larger than the sum of its proper divisors (20579761).

2111001031031 is a wasteful number, since it uses less digits than its factorization.

2111001031031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20579760.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 2111001031031 its reverse (1301301001112), we get a palindrome (3412302032143).

The spelling of 2111001031031 in words is "two trillion, one hundred eleven billion, one million, thirty-one thousand, thirty-one".