242120515001 has 2 divisors, whose sum is σ = 242120515002. Its totient is φ = 242120515000.

The previous prime is 242120514989. The next prime is 242120515003. The reversal of 242120515001 is 100515021242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 239962819600 + 2157695401 = 489860^2 + 46451^2 .

It is a cyclic number.

It is not a de Polignac number, because 242120515001 - 2²² = 242116320697 is a prime.

Together with 242120515003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (242120515003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121060257500 + 121060257501.

It is an arithmetic number, because the mean of its divisors is an integer number (121060257501).

Almost surely, 2^242120515001 is an apocalyptic number.

It is an amenable number.

242120515001 is a deficient number, since it is larger than the sum of its proper divisors (1).

242120515001 is an equidigital number, since it uses as much as digits as its factorization.

242120515001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 242120515001 its reverse (100515021242), we get a palindrome (342635536243).

The spelling of 242120515001 in words is "two hundred forty-two billion, one hundred twenty million, five hundred fifteen thousand, one".