21220021002110 has 128 divisors (see below), whose sum is σ = 43921900366848. Its totient is φ = 7230746880000.

The previous prime is 21220021002077. The next prime is 21220021002139. The reversal of 21220021002110 is 1120012002212.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12315739709 + ... + 12315741431.

It is an arithmetic number, because the mean of its divisors is an integer number (343139846616).

Almost surely, 2^{21220021002110} is an apocalyptic number.

21220021002110 is an abundant number, since it is smaller than the sum of its proper divisors (22701879364738).

21220021002110 is a wasteful number, since it uses less digits than its factorization.

21220021002110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3490.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21220021002110 its reverse (1120012002212), we get a palindrome (22340033004322).

The spelling of 21220021002110 in words is "twenty-one trillion, two hundred twenty billion, twenty-one million, two thousand, one hundred ten".