21213030113211 has 16 divisors (see below), whose sum is σ = 28974073701888. Its totient is φ = 13797007560000.

The previous prime is 21213030113161. The next prime is 21213030113227. The reversal of 21213030113211 is 11231103031212.

It is not a de Polignac number, because 21213030113211 - 2¹⁰ = 21213030112187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21213030113251) 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, 24069586 + ... + 24935336.

It is an arithmetic number, because the mean of its divisors is an integer number (1810879606368).

Almost surely, 2^{21213030113211} is an apocalyptic number.

21213030113211 is a deficient number, since it is larger than the sum of its proper divisors (7761043588677).

21213030113211 is a wasteful number, since it uses less digits than its factorization.

21213030113211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065002.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 21213030113211 its reverse (11231103031212), we get a palindrome (32444133144423).

The spelling of 21213030113211 in words is "twenty-one trillion, two hundred thirteen billion, thirty million, one hundred thirteen thousand, two hundred eleven".