1442200121 has 2 divisors, whose sum is σ = 1442200122. Its totient is φ = 1442200120.

The previous prime is 1442200103. The next prime is 1442200127. The reversal of 1442200121 is 1210022441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1119638521 + 322561600 = 33461^2 + 17960^2 .

It is an emirp because it is prime and its reverse (1210022441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1442200121 - 2⁶ = 1442200057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1442200121.

It is not a weakly prime, because it can be changed into another prime (1442200127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 721100060 + 721100061.

It is an arithmetic number, because the mean of its divisors is an integer number (721100061).

Almost surely, 2^1442200121 is an apocalyptic number.

It is an amenable number.

1442200121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1442200121 is an equidigital number, since it uses as much as digits as its factorization.

1442200121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1442200121 is about 37976.3099971548. The cubic root of 1442200121 is about 1129.8180512123.

Adding to 1442200121 its reverse (1210022441), we get a palindrome (2652222562).

The spelling of 1442200121 in words is "one billion, four hundred forty-two million, two hundred thousand, one hundred twenty-one".