201324031021 has 2 divisors, whose sum is σ = 201324031022. Its totient is φ = 201324031020.

The previous prime is 201324030991. The next prime is 201324031049. The reversal of 201324031021 is 120130423102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137170233225 + 64153797796 = 370365^2 + 253286^2 .

It is a cyclic number.

It is not a de Polignac number, because 201324031021 - 2¹³ = 201324022829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201324031021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201324035021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100662015510 + 100662015511.

It is an arithmetic number, because the mean of its divisors is an integer number (100662015511).

Almost surely, 2^201324031021 is an apocalyptic number.

It is an amenable number.

201324031021 is a deficient number, since it is larger than the sum of its proper divisors (1).

201324031021 is an equidigital number, since it uses as much as digits as its factorization.

201324031021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 201324031021 its reverse (120130423102), we get a palindrome (321454454123).

The spelling of 201324031021 in words is "two hundred one billion, three hundred twenty-four million, thirty-one thousand, twenty-one".