21062113221 has 8 divisors (see below), whose sum is σ = 28136515360. Its totient is φ = 14014559952.

The previous prime is 21062113199. The next prime is 21062113231. The reversal of 21062113221 is 12231126012.

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

It is not a de Polignac number, because 21062113221 - 2¹⁴ = 21062096837 is a prime.

It is a super-2 number, since 2×21062113221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21062113231) 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, 6710386 + ... + 6713523.

It is an arithmetic number, because the mean of its divisors is an integer number (3517064420).

Almost surely, 2^21062113221 is an apocalyptic number.

It is an amenable number.

21062113221 is a deficient number, since it is larger than the sum of its proper divisors (7074402139).

21062113221 is a wasteful number, since it uses less digits than its factorization.

21062113221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13424435.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21062113221 its reverse (12231126012), we get a palindrome (33293239233).

The spelling of 21062113221 in words is "twenty-one billion, sixty-two million, one hundred thirteen thousand, two hundred twenty-one".