1421210001 has 16 divisors (see below), whose sum is σ = 1911714048. Its totient is φ = 939120000.

The previous prime is 1421209981. The next prime is 1421210003. The reversal of 1421210001 is 1000121241.

It is a happy number.

It is not a de Polignac number, because 1421210001 - 2²² = 1417015697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1421210003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199501 + ... + 206501.

It is an arithmetic number, because the mean of its divisors is an integer number (119482128).

Almost surely, 2^1421210001 is an apocalyptic number.

It is an amenable number.

1421210001 is a deficient number, since it is larger than the sum of its proper divisors (490504047).

1421210001 is a wasteful number, since it uses less digits than its factorization.

1421210001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7592.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1421210001 is about 37698.9389903748. The cubic root of 1421210001 is about 1124.3100298614.

Adding to 1421210001 its reverse (1000121241), we get a palindrome (2421331242).

The spelling of 1421210001 in words is "one billion, four hundred twenty-one million, two hundred ten thousand, one".