21111012213 has 8 divisors (see below), whose sum is σ = 28152319776. Its totient is φ = 14071856400.

The previous prime is 21111012203. The next prime is 21111012259. The reversal of 21111012213 is 31221011112.

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

It is not a de Polignac number, because 21111012213 - 2¹⁰ = 21111011189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21111012192 and 21111012201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111012203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 514903 + ... + 554388.

It is an arithmetic number, because the mean of its divisors is an integer number (3519039972).

Almost surely, 2^21111012213 is an apocalyptic number.

It is an amenable number.

21111012213 is a deficient number, since it is larger than the sum of its proper divisors (7041307563).

21111012213 is a wasteful number, since it uses less digits than its factorization.

21111012213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075875.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21111012213 its reverse (31221011112), we get a palindrome (52332023325).

The spelling of 21111012213 in words is "twenty-one billion, one hundred eleven million, twelve thousand, two hundred thirteen".