542421246121 has 2 divisors, whose sum is σ = 542421246122. Its totient is φ = 542421246120.

The previous prime is 542421246113. The next prime is 542421246139. The reversal of 542421246121 is 121642124245.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 362390756121 + 180030490000 = 601989^2 + 424300^2 .

It is a cyclic number.

It is not a de Polignac number, because 542421246121 - 2³ = 542421246113 is a prime.

It is not a weakly prime, because it can be changed into another prime (542421246161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271210623060 + 271210623061.

It is an arithmetic number, because the mean of its divisors is an integer number (271210623061).

Almost surely, 2^542421246121 is an apocalyptic number.

It is an amenable number.

542421246121 is a deficient number, since it is larger than the sum of its proper divisors (1).

542421246121 is an equidigital number, since it uses as much as digits as its factorization.

542421246121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30720, while the sum is 34.

The spelling of 542421246121 in words is "five hundred forty-two billion, four hundred twenty-one million, two hundred forty-six thousand, one hundred twenty-one".