200020110021 has 16 divisors (see below), whose sum is σ = 297291332800. Its totient is φ = 132912380304.

The previous prime is 200020109953. The next prime is 200020110023. The reversal of 200020110021 is 120011020002.

It is not a de Polignac number, because 200020110021 - 2¹⁸ = 200019847877 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200020109985 and 200020110012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200020110023) 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, 12057106 + ... + 12073683.

It is an arithmetic number, because the mean of its divisors is an integer number (18580708300).

Almost surely, 2^200020110021 is an apocalyptic number.

It is an amenable number.

200020110021 is a deficient number, since it is larger than the sum of its proper divisors (97271222779).

200020110021 is a wasteful number, since it uses less digits than its factorization.

200020110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24131105 (or 24131099 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 200020110021 its reverse (120011020002), we get a palindrome (320031130023).

The spelling of 200020110021 in words is "two hundred billion, twenty million, one hundred ten thousand, twenty-one".