21201210046 has 8 divisors (see below), whose sum is σ = 32033945520. Its totient is φ = 10523228208.

The previous prime is 21201210007. The next prime is 21201210047. The reversal of 21201210046 is 64001210212.

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

It is a super-2 number, since 2×21201210046² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201210047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38688066 + ... + 38688613.

It is an arithmetic number, because the mean of its divisors is an integer number (4004243190).

Almost surely, 2^21201210046 is an apocalyptic number.

21201210046 is a deficient number, since it is larger than the sum of its proper divisors (10832735474).

21201210046 is a wasteful number, since it uses less digits than its factorization.

21201210046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77376818.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21201210046 its reverse (64001210212), we get a palindrome (85202420258).

The spelling of 21201210046 in words is "twenty-one billion, two hundred one million, two hundred ten thousand, forty-six".