201011102021 has 4 divisors (see below), whose sum is σ = 201062952972. Its totient is φ = 200959251072.

The previous prime is 201011101999. The next prime is 201011102027. The reversal of 201011102021 is 120201110102.

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

It can be written as a sum of positive squares in 2 ways, for example, as 70841677921 + 130169424100 = 266161^2 + 360790^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201011102021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201011101993 and 201011102011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201011102027) 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, 25919660 + ... + 25927413.

It is an arithmetic number, because the mean of its divisors is an integer number (50265738243).

Almost surely, 2^201011102021 is an apocalyptic number.

It is an amenable number.

201011102021 is a deficient number, since it is larger than the sum of its proper divisors (51850951).

201011102021 is an equidigital number, since it uses as much as digits as its factorization.

201011102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51850950.

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

Adding to 201011102021 its reverse (120201110102), we get a palindrome (321212212123).

The spelling of 201011102021 in words is "two hundred one billion, eleven million, one hundred two thousand, twenty-one".