21034025211 has 16 divisors (see below), whose sum is σ = 28976220416. Its totient is φ = 13563589536.

The previous prime is 21034025203. The next prime is 21034025213. The reversal of 21034025211 is 11252043012.

It is not a de Polignac number, because 21034025211 - 2³ = 21034025203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21034025213) 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, 778240 + ... + 804813.

It is an arithmetic number, because the mean of its divisors is an integer number (1811013776).

Almost surely, 2^21034025211 is an apocalyptic number.

21034025211 is a deficient number, since it is larger than the sum of its proper divisors (7942195205).

21034025211 is a wasteful number, since it uses less digits than its factorization.

21034025211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1583202.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 21034025211 its reverse (11252043012), we get a palindrome (32286068223).

The spelling of 21034025211 in words is "twenty-one billion, thirty-four million, twenty-five thousand, two hundred eleven".