21021210210022 has 32 divisors (see below), whose sum is σ = 37376808422400. Its totient is φ = 8760189463200.

The previous prime is 21021210210001. The next prime is 21021210210047. The reversal of 21021210210022 is 22001201212012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21021210209978 and 21021210210005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 811115697 + ... + 811141612.

It is an arithmetic number, because the mean of its divisors is an integer number (1168025263200).

Almost surely, 2^{21021210210022} is an apocalyptic number.

21021210210022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21021210210022 is a deficient number, since it is larger than the sum of its proper divisors (16355598212378).

21021210210022 is a wasteful number, since it uses less digits than its factorization.

21021210210022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1622257372.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21021210210022 its reverse (22001201212012), we get a palindrome (43022411422034).

The spelling of 21021210210022 in words is "twenty-one trillion, twenty-one billion, two hundred ten million, two hundred ten thousand, twenty-two".