21220101022244 has 12 divisors (see below), whose sum is σ = 37144105689600. Its totient is φ = 10607499396648.

The previous prime is 21220101022243. The next prime is 21220101022249. The reversal of 21220101022244 is 44222010102212.

It is not an unprimeable number, because it can be changed into a prime (21220101022243) 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, 637759904 + ... + 637793175.

It is an arithmetic number, because the mean of its divisors is an integer number (3095342140800).

Almost surely, 2^{21220101022244} is an apocalyptic number.

It is an amenable number.

21220101022244 is a deficient number, since it is larger than the sum of its proper divisors (15924004667356).

21220101022244 is a wasteful number, since it uses less digits than its factorization.

21220101022244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275557242 (or 1275557240 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 21220101022244 its reverse (44222010102212), we get a palindrome (65442111124456).

The spelling of 21220101022244 in words is "twenty-one trillion, two hundred twenty billion, one hundred one million, twenty-two thousand, two hundred forty-four".