21211202010 has 32 divisors (see below), whose sum is σ = 52282749312. Its totient is φ = 5503446720.

The previous prime is 21211201987. The next prime is 21211202099. The reversal of 21211202010 is 1020211212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9553486 + ... + 9555705.

It is an arithmetic number, because the mean of its divisors is an integer number (1633835916).

Almost surely, 2^21211202010 is an apocalyptic number.

21211202010 is an abundant number, since it is smaller than the sum of its proper divisors (31071547302).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21211202010 is a wasteful number, since it uses less digits than its factorization.

21211202010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19109238.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21211202010 its reverse (1020211212), we get a palindrome (22231413222).

The spelling of 21211202010 in words is "twenty-one billion, two hundred eleven million, two hundred two thousand, ten".