1421201231 has 16 divisors (see below), whose sum is σ = 1536921600. Its totient is φ = 1311055200.

The previous prime is 1421201203. The next prime is 1421201233. The reversal of 1421201231 is 1321021241.

It is a de Polignac number, because none of the positive numbers 2^k-1421201231 is a prime.

It is a super-2 number, since 2×1421201231² = 4039625877991830722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421201233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61016 + ... + 81026.

It is an arithmetic number, because the mean of its divisors is an integer number (96057600).

Almost surely, 2^1421201231 is an apocalyptic number.

1421201231 is a deficient number, since it is larger than the sum of its proper divisors (115720369).

1421201231 is a wasteful number, since it uses less digits than its factorization.

1421201231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20150.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1421201231 is about 37698.8226739244. The cubic root of 1421201231 is about 1124.3077172266.

Adding to 1421201231 its reverse (1321021241), we get a palindrome (2742222472).

The spelling of 1421201231 in words is "one billion, four hundred twenty-one million, two hundred one thousand, two hundred thirty-one".