21214036536422 has 4 divisors (see below), whose sum is σ = 31821054804636. Its totient is φ = 10607018268210.

The previous prime is 21214036536403. The next prime is 21214036536449. The reversal of 21214036536422 is 22463563041212.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×21214036536422² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21214036536422.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5303509134104 + ... + 5303509134107.

It is an arithmetic number, because the mean of its divisors is an integer number (7955263701159).

Almost surely, 2^{21214036536422} is an apocalyptic number.

21214036536422 is a deficient number, since it is larger than the sum of its proper divisors (10607018268214).

21214036536422 is a wasteful number, since it uses less digits than its factorization.

21214036536422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10607018268213.

The product of its (nonzero) digits is 414720, while the sum is 41.

Adding to 21214036536422 its reverse (22463563041212), we get a palindrome (43677599577634).

The spelling of 21214036536422 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, five hundred thirty-six thousand, four hundred twenty-two".