201001122202021 has 4 divisors (see below), whose sum is σ = 201001339781152. Its totient is φ = 201000904622892.

The previous prime is 201001122201989. The next prime is 201001122202031. The reversal of 201001122202021 is 120202221100102.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 201001122202021 - 2⁵ = 201001122201989 is a prime.

It is a super-2 number, since 2×201001122202021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201001122201986 and 201001122202004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201001122202031) 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, 107397921 + ... + 109253446.

It is an arithmetic number, because the mean of its divisors is an integer number (50250334945288).

Almost surely, 2^{201001122202021} is an apocalyptic number.

It is an amenable number.

201001122202021 is a deficient number, since it is larger than the sum of its proper divisors (217579131).

201001122202021 is an equidigital number, since it uses as much as digits as its factorization.

201001122202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217579130.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 201001122202021 its reverse (120202221100102), we get a palindrome (321203343302123).

The spelling of 201001122202021 in words is "two hundred one trillion, one billion, one hundred twenty-two million, two hundred two thousand, twenty-one".