201311332021021 has 2 divisors, whose sum is σ = 201311332021022. Its totient is φ = 201311332021020.

The previous prime is 201311332020977. The next prime is 201311332021027. The reversal of 201311332021021 is 120120233113102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196107394707225 + 5203937313796 = 14003835^2 + 2281214^2 .

It is a cyclic number.

It is not a de Polignac number, because 201311332021021 - 2²⁹ = 201310795150109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201311332020983 and 201311332021001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201311332021027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100655666010510 + 100655666010511.

It is an arithmetic number, because the mean of its divisors is an integer number (100655666010511).

Almost surely, 2^{201311332021021} is an apocalyptic number.

It is an amenable number.

201311332021021 is a deficient number, since it is larger than the sum of its proper divisors (1).

201311332021021 is an equidigital number, since it uses as much as digits as its factorization.

201311332021021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 201311332021021 its reverse (120120233113102), we get a palindrome (321431565134123).

The spelling of 201311332021021 in words is "two hundred one trillion, three hundred eleven billion, three hundred thirty-two million, twenty-one thousand, twenty-one".