22016253105621 has 6 divisors (see below), whose sum is σ = 31801254485910. Its totient is φ = 14677502070408.

The previous prime is 22016253105601. The next prime is 22016253105661. The reversal of 22016253105621 is 12650135261022.

22016253105621 is a `hidden beast` number, since 2 + 2 + 0 + 1 + 6 + 25 + 3 + 1 + 0 + 5 + 621 = 666.

It can be written as a sum of positive squares in only one way, i.e., 21549881574225 + 466371531396 = 4642185^2 + 682914^2 .

It is not a de Polignac number, because 22016253105621 - 2⁶ = 22016253105557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22016253105601) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1223125172526 + ... + 1223125172543.

It is an arithmetic number, because the mean of its divisors is an integer number (5300209080985).

Almost surely, 2^{22016253105621} is an apocalyptic number.

It is an amenable number.

22016253105621 is a deficient number, since it is larger than the sum of its proper divisors (9785001380289).

22016253105621 is a wasteful number, since it uses less digits than its factorization.

22016253105621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2446250345075 (or 2446250345072 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

Adding to 22016253105621 its reverse (12650135261022), we get a palindrome (34666388366643).

The spelling of 22016253105621 in words is "twenty-two trillion, sixteen billion, two hundred fifty-three million, one hundred five thousand, six hundred twenty-one".