200111201021 has 4 divisors (see below), whose sum is σ = 200113724352. Its totient is φ = 200108677692.

The previous prime is 200111201011. The next prime is 200111201027. The reversal of 200111201021 is 120102111002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120102111002 = 2 ⋅60051055501.

It is a cyclic number.

It is not a de Polignac number, because 200111201021 - 2⁶ = 200111200957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200111200993 and 200111201011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200111201027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1138715 + ... + 1302648.

It is an arithmetic number, because the mean of its divisors is an integer number (50028431088).

Almost surely, 2^200111201021 is an apocalyptic number.

It is an amenable number.

200111201021 is a deficient number, since it is larger than the sum of its proper divisors (2523331).

200111201021 is an equidigital number, since it uses as much as digits as its factorization.

200111201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2523330.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 200111201021 its reverse (120102111002), we get a palindrome (320213312023).

The spelling of 200111201021 in words is "two hundred billion, one hundred eleven million, two hundred one thousand, twenty-one".