400221405021401 has 4 divisors (see below), whose sum is σ = 403276530250704. Its totient is φ = 397166279792100.

The previous prime is 400221405021397. The next prime is 400221405021583. The reversal of 400221405021401 is 104120504122004.

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 400221405021401 - 2² = 400221405021397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400221405221401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1527562614455 + ... + 1527562614716.

It is an arithmetic number, because the mean of its divisors is an integer number (100819132562676).

Almost surely, 2^{400221405021401} is an apocalyptic number.

It is an amenable number.

400221405021401 is a deficient number, since it is larger than the sum of its proper divisors (3055125229303).

400221405021401 is a wasteful number, since it uses less digits than its factorization.

400221405021401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3055125229302.

The product of its (nonzero) digits is 2560, while the sum is 26.

Adding to 400221405021401 its reverse (104120504122004), we get a palindrome (504341909143405).

The spelling of 400221405021401 in words is "four hundred trillion, two hundred twenty-one billion, four hundred five million, twenty-one thousand, four hundred one".