10000400421401 has 4 divisors (see below), whose sum is σ = 10769661992292. Its totient is φ = 9231138850512.

The previous prime is 10000400421379. The next prime is 10000400421409. The reversal of 10000400421401 is 10412400400001.

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 4044121000000 + 5956279421401 = 2011000^2 + 2440549^2 .

It is a cyclic number.

It is not a de Polignac number, because 10000400421401 - 2²² = 10000396227097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10000400421401.

It is not an unprimeable number, because it can be changed into a prime (10000400421409) 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, 384630785426 + ... + 384630785451.

It is an arithmetic number, because the mean of its divisors is an integer number (2692415498073).

Almost surely, 2^{10000400421401} is an apocalyptic number.

It is an amenable number.

10000400421401 is a deficient number, since it is larger than the sum of its proper divisors (769261570891).

10000400421401 is an equidigital number, since it uses as much as digits as its factorization.

10000400421401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769261570890.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 10000400421401 its reverse (10412400400001), we get a palindrome (20412800821402).

The spelling of 10000400421401 in words is "ten trillion, four hundred million, four hundred twenty-one thousand, four hundred one".