22201111657221 has 32 divisors (see below), whose sum is σ = 35301495060480. Its totient is φ = 12134649282624.

The previous prime is 22201111657159. The next prime is 22201111657243. The reversal of 22201111657221 is 12275611110222.

It is not a de Polignac number, because 22201111657221 - 2⁹ = 22201111656709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22201111657421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73525671 + ... + 73827003.

It is an arithmetic number, because the mean of its divisors is an integer number (1103171720640).

Almost surely, 2^{22201111657221} is an apocalyptic number.

22201111657221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22201111657221 is a deficient number, since it is larger than the sum of its proper divisors (13100383403259).

22201111657221 is a wasteful number, since it uses less digits than its factorization.

22201111657221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453905.

The product of its (nonzero) digits is 6720, while the sum is 33.

Adding to 22201111657221 its reverse (12275611110222), we get a palindrome (34476722767443).

The spelling of 22201111657221 in words is "twenty-two trillion, two hundred one billion, one hundred eleven million, six hundred fifty-seven thousand, two hundred twenty-one".