201330223021 has 4 divisors (see below), whose sum is σ = 201343917852. Its totient is φ = 201316528192.

The previous prime is 201330223001. The next prime is 201330223027. The reversal of 201330223021 is 120322033102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120322033102 = 2 ⋅60161016551.

It can be written as a sum of positive squares in 2 ways, for example, as 28768908996 + 172561314025 = 169614^2 + 415405^2 .

It is a cyclic number.

It is not a de Polignac number, because 201330223021 - 2²⁵ = 201296668589 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201330223021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201330223027) 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, 6825340 + ... + 6854773.

It is an arithmetic number, because the mean of its divisors is an integer number (50335979463).

Almost surely, 2^201330223021 is an apocalyptic number.

It is an amenable number.

201330223021 is a deficient number, since it is larger than the sum of its proper divisors (13694831).

201330223021 is a wasteful number, since it uses less digits than its factorization.

201330223021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13694830.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 201330223021 its reverse (120322033102), we get a palindrome (321652256123).

The spelling of 201330223021 in words is "two hundred one billion, three hundred thirty million, two hundred twenty-three thousand, twenty-one".