202021220011 has 4 divisors (see below), whose sum is σ = 217561313872. Its totient is φ = 186481126152.

The previous prime is 202021219993. The next prime is 202021220021. The reversal of 202021220011 is 110022120202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 202021220011 - 2⁵ = 202021219979 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 15540093847 = 202021220011 / (2 + 0 + 2 + 0 + 2 + 1 + 2 + 2 + 0 + 0 + 1 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202021219973 and 202021220000.

It is not an unprimeable number, because it can be changed into a prime (202021220021) 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, 7770046911 + ... + 7770046936.

It is an arithmetic number, because the mean of its divisors is an integer number (54390328468).

Almost surely, 2^202021220011 is an apocalyptic number.

202021220011 is a deficient number, since it is larger than the sum of its proper divisors (15540093861).

202021220011 is a wasteful number, since it uses less digits than its factorization.

202021220011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15540093860.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 202021220011 its reverse (110022120202), we get a palindrome (312043340213).

The spelling of 202021220011 in words is "two hundred two billion, twenty-one million, two hundred twenty thousand, eleven".