242101312021 has 2 divisors, whose sum is σ = 242101312022. Its totient is φ = 242101312020.

The previous prime is 242101312001. The next prime is 242101312051. The reversal of 242101312021 is 120213101242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148348995921 + 93752316100 = 385161^2 + 306190^2 .

It is a cyclic number.

It is not a de Polignac number, because 242101312021 - 2⁵ = 242101311989 is a prime.

It is a super-2 number, since 2×242101312021² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 242101312021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242101312001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121050656010 + 121050656011.

It is an arithmetic number, because the mean of its divisors is an integer number (121050656011).

Almost surely, 2^242101312021 is an apocalyptic number.

It is an amenable number.

242101312021 is a deficient number, since it is larger than the sum of its proper divisors (1).

242101312021 is an equidigital number, since it uses as much as digits as its factorization.

242101312021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 242101312021 its reverse (120213101242), we get a palindrome (362314413263).

The spelling of 242101312021 in words is "two hundred forty-two billion, one hundred one million, three hundred twelve thousand, twenty-one".