42128890201 has 2 divisors, whose sum is σ = 42128890202. Its totient is φ = 42128890200.

The previous prime is 42128890183. The next prime is 42128890259. The reversal of 42128890201 is 10209882124.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28128321225 + 14000568976 = 167715^2 + 118324^2 .

It is a cyclic number.

It is not a de Polignac number, because 42128890201 - 2⁵ = 42128890169 is a prime.

It is not a weakly prime, because it can be changed into another prime (42128890801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21064445100 + 21064445101.

It is an arithmetic number, because the mean of its divisors is an integer number (21064445101).

Almost surely, 2^42128890201 is an apocalyptic number.

It is an amenable number.

42128890201 is a deficient number, since it is larger than the sum of its proper divisors (1).

42128890201 is an equidigital number, since it uses as much as digits as its factorization.

42128890201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 37.

The spelling of 42128890201 in words is "forty-two billion, one hundred twenty-eight million, eight hundred ninety thousand, two hundred one".