42045540101 has 2 divisors, whose sum is σ = 42045540102. Its totient is φ = 42045540100.

The previous prime is 42045540049. The next prime is 42045540109. The reversal of 42045540101 is 10104554024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41785492225 + 260047876 = 204415^2 + 16126^2 .

It is a cyclic number.

It is not a de Polignac number, because 42045540101 - 2²⁶ = 41978431237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42045540109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21022770050 + 21022770051.

It is an arithmetic number, because the mean of its divisors is an integer number (21022770051).

Almost surely, 2^42045540101 is an apocalyptic number.

It is an amenable number.

42045540101 is a deficient number, since it is larger than the sum of its proper divisors (1).

42045540101 is an equidigital number, since it uses as much as digits as its factorization.

42045540101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3200, while the sum is 26.

The spelling of 42045540101 in words is "forty-two billion, forty-five million, five hundred forty thousand, one hundred one".