22101021020221 has 24 divisors (see below), whose sum is σ = 27643235140224. Its totient is φ = 17455351829760.

The previous prime is 22101021020189. The next prime is 22101021020237. The reversal of 22101021020221 is 12202012010122.

It is a happy number.

It is not a de Polignac number, because 22101021020221 - 2⁵ = 22101021020189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22101021020195 and 22101021020204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22101021020261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 349634901 + ... + 349698106.

It is an arithmetic number, because the mean of its divisors is an integer number (1151801464176).

Almost surely, 2^{22101021020221} is an apocalyptic number.

It is an amenable number.

22101021020221 is a deficient number, since it is larger than the sum of its proper divisors (5542214120003).

22101021020221 is a wasteful number, since it uses less digits than its factorization.

22101021020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699333061 (or 699333048 counting only the distinct ones).

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

Adding to 22101021020221 its reverse (12202012010122), we get a palindrome (34303033030343).

It can be divided in two parts, 2210102 and 1020221, that added together give a palindrome (3230323).

The spelling of 22101021020221 in words is "twenty-two trillion, one hundred one billion, twenty-one million, twenty thousand, two hundred twenty-one".