21214576216442 has 64 divisors (see below), whose sum is σ = 39022109199360. Its totient is φ = 8443455572736.

The previous prime is 21214576216441. The next prime is 21214576216451. The reversal of 21214576216442 is 24461267541212.

It is a super-2 number, since 2×21214576216442² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21214576216441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3425273 + ... + 7359459.

It is an arithmetic number, because the mean of its divisors is an integer number (609720456240).

Almost surely, 2^{21214576216442} is an apocalyptic number.

21214576216442 is a deficient number, since it is larger than the sum of its proper divisors (17807532982918).

21214576216442 is a wasteful number, since it uses less digits than its factorization.

21214576216442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3934515.

The product of its digits is 1290240, while the sum is 47.

The spelling of 21214576216442 in words is "twenty-one trillion, two hundred fourteen billion, five hundred seventy-six million, two hundred sixteen thousand, four hundred forty-two".