201472723021 has 2 divisors, whose sum is σ = 201472723022. Its totient is φ = 201472723020.

The previous prime is 201472722959. The next prime is 201472723031. The reversal of 201472723021 is 120327274102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 176442002500 + 25030720521 = 420050^2 + 158211^2 .

It is a cyclic number.

It is not a de Polignac number, because 201472723021 - 2¹¹ = 201472720973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201472723031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100736361510 + 100736361511.

It is an arithmetic number, because the mean of its divisors is an integer number (100736361511).

Almost surely, 2^201472723021 is an apocalyptic number.

It is an amenable number.

201472723021 is a deficient number, since it is larger than the sum of its proper divisors (1).

201472723021 is an equidigital number, since it uses as much as digits as its factorization.

201472723021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9408, while the sum is 31.

Adding to 201472723021 its reverse (120327274102), we get a palindrome (321799997123).

The spelling of 201472723021 in words is "two hundred one billion, four hundred seventy-two million, seven hundred twenty-three thousand, twenty-one".