22120002021 has 16 divisors (see below), whose sum is σ = 32076535680. Its totient is φ = 13477531200.

The previous prime is 22120002017. The next prime is 22120002049. The reversal of 22120002021 is 12020002122.

It is not a de Polignac number, because 22120002021 - 2² = 22120002017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22120001988 and 22120002006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22120002001) 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, 2803881 + ... + 2811758.

It is an arithmetic number, because the mean of its divisors is an integer number (2004783480).

Almost surely, 2^22120002021 is an apocalyptic number.

It is an amenable number.

22120002021 is a deficient number, since it is larger than the sum of its proper divisors (9956533659).

22120002021 is a wasteful number, since it uses less digits than its factorization.

22120002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5615756.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 22120002021 its reverse (12020002122), we get a palindrome (34140004143).

The spelling of 22120002021 in words is "twenty-two billion, one hundred twenty million, two thousand, twenty-one".