1401434234021 has 4 divisors (see below), whose sum is σ = 1435615556844. Its totient is φ = 1367252911200.

The previous prime is 1401434233993. The next prime is 1401434234041. The reversal of 1401434234021 is 1204324341041.

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 542270232100 + 859164001921 = 736390^2 + 926911^2 .

It is a cyclic number.

It is not a de Polignac number, because 1401434234021 - 2⁶ = 1401434233957 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 (1401434234041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17090661350 + ... + 17090661431.

It is an arithmetic number, because the mean of its divisors is an integer number (358903889211).

Almost surely, 2^{1401434234021} is an apocalyptic number.

It is an amenable number.

1401434234021 is a deficient number, since it is larger than the sum of its proper divisors (34181322823).

1401434234021 is an equidigital number, since it uses as much as digits as its factorization.

1401434234021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34181322822.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 1401434234021 its reverse (1204324341041), we get a palindrome (2605758575062).

The spelling of 1401434234021 in words is "one trillion, four hundred one billion, four hundred thirty-four million, two hundred thirty-four thousand, twenty-one".