21004150211 has 16 divisors (see below), whose sum is σ = 23418298368. Its totient is φ = 18674712000.

The previous prime is 21004150169. The next prime is 21004150241. The reversal of 21004150211 is 11205140012.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21004150211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21004150211.

It is not an unprimeable number, because it can be changed into a prime (21004150241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 726686 + ... + 755036.

It is an arithmetic number, because the mean of its divisors is an integer number (1463643648).

Almost surely, 2^21004150211 is an apocalyptic number.

21004150211 is a deficient number, since it is larger than the sum of its proper divisors (2414148157).

21004150211 is a wasteful number, since it uses less digits than its factorization.

21004150211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29842.

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 21004150211 its reverse (11205140012), we get a palindrome (32209290223).

The spelling of 21004150211 in words is "twenty-one billion, four million, one hundred fifty thousand, two hundred eleven".