1421002331 has 4 divisors (see below), whose sum is σ = 1624002672. Its totient is φ = 1218001992.

The previous prime is 1421002327. The next prime is 1421002339. The reversal of 1421002331 is 1332001241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1421002331 - 2² = 1421002327 is a prime.

It is a super-2 number, since 2×1421002331² = 4038495249414867122, which contains 22 as substring.

It is a Duffinian number.

1421002331 is a modest number, since divided by 2331 gives 1421 as remainder.

It is not an unprimeable number, because it can be changed into a prime (1421002339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101500160 + ... + 101500173.

It is an arithmetic number, because the mean of its divisors is an integer number (406000668).

Almost surely, 2^1421002331 is an apocalyptic number.

1421002331 is a deficient number, since it is larger than the sum of its proper divisors (203000341).

1421002331 is an equidigital number, since it uses as much as digits as its factorization.

1421002331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203000340.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1421002331 is about 37696.1845682027. The cubic root of 1421002331 is about 1124.2552650631.

Adding to 1421002331 its reverse (1332001241), we get a palindrome (2753003572).

The spelling of 1421002331 in words is "one billion, four hundred twenty-one million, two thousand, three hundred thirty-one".