21201213010 has 16 divisors (see below), whose sum is σ = 39821409216. Its totient is φ = 8111768368.

The previous prime is 21201212959. The next prime is 21201213013. The reversal of 21201213010 is 1031210212.

It is not an unprimeable number, because it can be changed into a prime (21201213013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46089364 + ... + 46089823.

It is an arithmetic number, because the mean of its divisors is an integer number (2488838076).

Almost surely, 2^21201213010 is an apocalyptic number.

21201213010 is a deficient number, since it is larger than the sum of its proper divisors (18620196206).

21201213010 is a wasteful number, since it uses less digits than its factorization.

21201213010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92179217.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21201213010 its reverse (1031210212), we get a palindrome (22232423222).

The spelling of 21201213010 in words is "twenty-one billion, two hundred one million, two hundred thirteen thousand, ten".