21100022011031 has 8 divisors (see below), whose sum is σ = 21670353753600. Its totient is φ = 20529693472608.

The previous prime is 21100022011009. The next prime is 21100022011049. The reversal of 21100022011031 is 13011022000112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21100022011031 is a prime.

It is a super-2 number, since 2×21100022011031² (a number of 27 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 = 21100022010997 and 21100022011015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100022014031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19219745 + ... + 20287893.

It is an arithmetic number, because the mean of its divisors is an integer number (2708794219200).

Almost surely, 2^{21100022011031} is an apocalyptic number.

21100022011031 is a deficient number, since it is larger than the sum of its proper divisors (570331742569).

21100022011031 is a wasteful number, since it uses less digits than its factorization.

21100022011031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1602073.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21100022011031 its reverse (13011022000112), we get a palindrome (34111044011143).

The spelling of 21100022011031 in words is "twenty-one trillion, one hundred billion, twenty-two million, eleven thousand, thirty-one".