42123432101 has 2 divisors, whose sum is σ = 42123432102. Its totient is φ = 42123432100.

The previous prime is 42123432097. The next prime is 42123432137. The reversal of 42123432101 is 10123432124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37354839076 + 4768593025 = 193274^2 + 69055^2 .

It is a cyclic number.

It is not a de Polignac number, because 42123432101 - 2² = 42123432097 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42123432161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21061716050 + 21061716051.

It is an arithmetic number, because the mean of its divisors is an integer number (21061716051).

Almost surely, 2^42123432101 is an apocalyptic number.

It is an amenable number.

42123432101 is a deficient number, since it is larger than the sum of its proper divisors (1).

42123432101 is an equidigital number, since it uses as much as digits as its factorization.

42123432101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 42123432101 its sum of digits (23), we get a palindrome (42123432124).

Adding to 42123432101 its reverse (10123432124), we get a palindrome (52246864225).

The spelling of 42123432101 in words is "forty-two billion, one hundred twenty-three million, four hundred thirty-two thousand, one hundred one".