21210221002011 has 8 divisors (see below), whose sum is σ = 28296120247104. Its totient is φ = 14132234545800.

The previous prime is 21210221001979. The next prime is 21210221002043. The reversal of 21210221002011 is 11020012201212.

It is an interprime number because it is at equal distance from previous prime (21210221001979) and next prime (21210221002043).

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

It is not a de Polignac number, because 21210221002011 - 2⁵ = 21210221001979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21210221002111) 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, 1978190965 + ... + 1978201686.

It is an arithmetic number, because the mean of its divisors is an integer number (3537015030888).

Almost surely, 2^{21210221002011} is an apocalyptic number.

21210221002011 is a deficient number, since it is larger than the sum of its proper divisors (7085899245093).

21210221002011 is a wasteful number, since it uses less digits than its factorization.

21210221002011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3956394441.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21210221002011 its reverse (11020012201212), we get a palindrome (32230233203223).

The spelling of 21210221002011 in words is "twenty-one trillion, two hundred ten billion, two hundred twenty-one million, two thousand, eleven".