1231421401 has 48 divisors (see below), whose sum is σ = 1603514880. Its totient is φ = 938165760.

The previous prime is 1231421351. The next prime is 1231421431. The reversal of 1231421401 is 1041241321.

It is a de Polignac number, because none of the positive numbers 2^k-1231421401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231421431) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1109835 + ... + 1110943.

It is an arithmetic number, because the mean of its divisors is an integer number (33406560).

Almost surely, 2^1231421401 is an apocalyptic number.

It is an amenable number.

1231421401 is a deficient number, since it is larger than the sum of its proper divisors (372093479).

1231421401 is a wasteful number, since it uses less digits than its factorization.

1231421401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214 (or 1207 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1231421401 is about 35091.6143971747. The cubic root of 1231421401 is about 1071.8538337622.

Adding to 1231421401 its reverse (1041241321), we get a palindrome (2272662722).

The spelling of 1231421401 in words is "one billion, two hundred thirty-one million, four hundred twenty-one thousand, four hundred one".