231401221401 has 32 divisors (see below), whose sum is σ = 374423212800. Its totient is φ = 124094416896.

The previous prime is 231401221357. The next prime is 231401221411. The reversal of 231401221401 is 104122104132.

231401221401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 231401221401 - 2¹⁵ = 231401188633 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (231401221411) 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 31 ways as a sum of consecutive naturals, for example, 804036 + ... + 1053221.

It is an arithmetic number, because the mean of its divisors is an integer number (11700725400).

Almost surely, 2^231401221401 is an apocalyptic number.

231401221401 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

231401221401 is a deficient number, since it is larger than the sum of its proper divisors (143021991399).

231401221401 is a wasteful number, since it uses less digits than its factorization.

231401221401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1857633.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 231401221401 its reverse (104122104132), we get a palindrome (335523325533).

The spelling of 231401221401 in words is "two hundred thirty-one billion, four hundred one million, two hundred twenty-one thousand, four hundred one".