140401021430221 has 4 divisors (see below), whose sum is σ = 140426451796444. Its totient is φ = 140375591064000.

The previous prime is 140401021430179. The next prime is 140401021430269. The reversal of 140401021430221 is 122034120104041.

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

It can be written as a sum of positive squares in 2 ways, for example, as 97640682568900 + 42760338861321 = 9881330^2 + 6539139^2 .

It is a cyclic number.

It is not a de Polignac number, because 140401021430221 - 2⁹ = 140401021429709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140401021434221) 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, 12715174830 + ... + 12715185871.

It is an arithmetic number, because the mean of its divisors is an integer number (35106612949111).

Almost surely, 2^{140401021430221} is an apocalyptic number.

It is an amenable number.

140401021430221 is a deficient number, since it is larger than the sum of its proper divisors (25430366223).

140401021430221 is an equidigital number, since it uses as much as digits as its factorization.

140401021430221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25430366222.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 140401021430221 its reverse (122034120104041), we get a palindrome (262435141534262).

The spelling of 140401021430221 in words is "one hundred forty trillion, four hundred one billion, twenty-one million, four hundred thirty thousand, two hundred twenty-one".