231421021020401 has 4 divisors (see below), whose sum is σ = 232238763144432. Its totient is φ = 230603278896372.

The previous prime is 231421021020373. The next prime is 231421021020403. The reversal of 231421021020401 is 104020120124132.

231421021020401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231421021020401 - 2⁴² = 227022974509297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231421021020403) 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, 408871061591 + ... + 408871062156.

It is an arithmetic number, because the mean of its divisors is an integer number (58059690786108).

Almost surely, 2^{231421021020401} is an apocalyptic number.

It is an amenable number.

231421021020401 is a deficient number, since it is larger than the sum of its proper divisors (817742124031).

231421021020401 is an equidigital number, since it uses as much as digits as its factorization.

231421021020401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817742124030.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 231421021020401 its reverse (104020120124132), we get a palindrome (335441141144533).

The spelling of 231421021020401 in words is "two hundred thirty-one trillion, four hundred twenty-one billion, twenty-one million, twenty thousand, four hundred one".