21002214442 has 8 divisors (see below), whose sum is σ = 34367260032. Its totient is φ = 9546461100.

The previous prime is 21002214419. The next prime is 21002214449. The reversal of 21002214442 is 24441220012.

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

It is a super-2 number, since 2×21002214442² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 954646111 = 21002214442 / (2 + 1 + 0 + 0 + 2 + 2 + 1 + 4 + 4 + 4 + 2).

It is not an unprimeable number, because it can be changed into a prime (21002214449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 477323034 + ... + 477323077.

It is an arithmetic number, because the mean of its divisors is an integer number (4295907504).

Almost surely, 2^21002214442 is an apocalyptic number.

21002214442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21002214442 is a deficient number, since it is larger than the sum of its proper divisors (13365045590).

21002214442 is a wasteful number, since it uses less digits than its factorization.

21002214442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954646124.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 21002214442 its reverse (24441220012), we get a palindrome (45443434454).

The spelling of 21002214442 in words is "twenty-one billion, two million, two hundred fourteen thousand, four hundred forty-two".