1421065121 has 8 divisors (see below), whose sum is σ = 1657219200. Its totient is φ = 1218055524.

The previous prime is 1421065117. The next prime is 1421065259. The reversal of 1421065121 is 1215601241.

It is not a de Polignac number, because 1421065121 - 2² = 1421065117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1421065621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2071181 + ... + 2071866.

It is an arithmetic number, because the mean of its divisors is an integer number (207152400).

Almost surely, 2^1421065121 is an apocalyptic number.

It is an amenable number.

1421065121 is a deficient number, since it is larger than the sum of its proper divisors (236154079).

1421065121 is an frugal number, since it uses more digits than its factorization.

1421065121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4143068 (or 4143054 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 1421065121 is about 37697.0174019113. The cubic root of 1421065121 is about 1124.2718240198.

Adding to 1421065121 its reverse (1215601241), we get a palindrome (2636666362).

The spelling of 1421065121 in words is "one billion, four hundred twenty-one million, sixty-five thousand, one hundred twenty-one".