20111002022 has 4 divisors (see below), whose sum is σ = 30166503036. Its totient is φ = 10055501010.

The previous prime is 20111001971. The next prime is 20111002027. The reversal of 20111002022 is 22020011102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22020011102 = 2 ⋅11010005551.

It is a junction number, because it is equal to n+sod(n) for n = 20111001994 and 20111002012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111002027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5027750504 + ... + 5027750507.

It is an arithmetic number, because the mean of its divisors is an integer number (7541625759).

Almost surely, 2^20111002022 is an apocalyptic number.

20111002022 is a deficient number, since it is larger than the sum of its proper divisors (10055501014).

20111002022 is a wasteful number, since it uses less digits than its factorization.

20111002022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10055501013.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20111002022 its reverse (22020011102), we get a palindrome (42131013124).

The spelling of 20111002022 in words is "twenty billion, one hundred eleven million, two thousand, twenty-two".