22011012021 has 16 divisors (see below), whose sum is σ = 31349372544. Its totient is φ = 13688607744.

The previous prime is 22011012019. The next prime is 22011012041. The reversal of 22011012021 is 12021011022.

It is not a de Polignac number, because 22011012021 - 2¹ = 22011012019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22011011988 and 22011012006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22011012011) 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, 1903921 + ... + 1915446.

It is an arithmetic number, because the mean of its divisors is an integer number (1959335784).

Almost surely, 2^22011012021 is an apocalyptic number.

It is an amenable number.

22011012021 is a deficient number, since it is larger than the sum of its proper divisors (9338360523).

22011012021 is a wasteful number, since it uses less digits than its factorization.

22011012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3819500.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 22011012021 its reverse (12021011022), we get a palindrome (34032023043).

Subtracting from 22011012021 its reverse (12021011022), we obtain a palindrome (9990000999).

The spelling of 22011012021 in words is "twenty-two billion, eleven million, twelve thousand, twenty-one".