21220101222010 has 8 divisors (see below), whose sum is σ = 38196182199636. Its totient is φ = 8488040488800.

The previous prime is 21220101221989. The next prime is 21220101222011. The reversal of 21220101222010 is 1022210102212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20413055922561 + 807045299449 = 4518081^2 + 898357^2 .

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

It is a super-3 number, since 3×21220101222010³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21220101222011) 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, 1061005061091 + ... + 1061005061110.

Almost surely, 2^{21220101222010} is an apocalyptic number.

21220101222010 is a deficient number, since it is larger than the sum of its proper divisors (16976080977626).

21220101222010 is a wasteful number, since it uses less digits than its factorization.

21220101222010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2122010122208.

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

Adding to 21220101222010 its reverse (1022210102212), we get a palindrome (22242311324222).

The spelling of 21220101222010 in words is "twenty-one trillion, two hundred twenty billion, one hundred one million, two hundred twenty-two thousand, ten".