22011100021 has 16 divisors (see below), whose sum is σ = 23336184960. Its totient is φ = 20725306560.

The previous prime is 22011099989. The next prime is 22011100043. The reversal of 22011100021 is 12000111022.

It is a cyclic number.

It is not a de Polignac number, because 22011100021 - 2⁵ = 22011099989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22011099980 and 22011100007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22011100121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 800776 + ... + 827806.

It is an arithmetic number, because the mean of its divisors is an integer number (1458511560).

Almost surely, 2^22011100021 is an apocalyptic number.

It is an amenable number.

22011100021 is a deficient number, since it is larger than the sum of its proper divisors (1325084939).

22011100021 is a wasteful number, since it uses less digits than its factorization.

22011100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27756.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 22011100021 its reverse (12000111022), we get a palindrome (34011211043).

The spelling of 22011100021 in words is "twenty-two billion, eleven million, one hundred thousand, twenty-one".