21214341701 has 12 divisors (see below), whose sum is σ = 26129550348. Its totient is φ = 17114090112.

The previous prime is 21214341691. The next prime is 21214341761. The reversal of 21214341701 is 10714341212.

It can be written as a sum of positive squares in 2 ways, for example, as 6048172900 + 15166168801 = 77770^2 + 123151^2 .

It is not a de Polignac number, because 21214341701 - 2²⁶ = 21147232837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214341761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12732866 + ... + 12734531.

It is an arithmetic number, because the mean of its divisors is an integer number (2177462529).

Almost surely, 2^21214341701 is an apocalyptic number.

It is an amenable number.

21214341701 is a deficient number, since it is larger than the sum of its proper divisors (4915208647).

21214341701 is a wasteful number, since it uses less digits than its factorization.

21214341701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25467428 (or 25467421 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

Adding to 21214341701 its reverse (10714341212), we get a palindrome (31928682913).

The spelling of 21214341701 in words is "twenty-one billion, two hundred fourteen million, three hundred forty-one thousand, seven hundred one".