210401004221 has 4 divisors (see below), whose sum is σ = 210417298272. Its totient is φ = 210384710172.

The previous prime is 210401004173. The next prime is 210401004259. The reversal of 210401004221 is 122400104012.

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 a de Polignac number, because none of the positive numbers 2^k-210401004221 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 210401004221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210401064221) 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, 8127641 + ... + 8153486.

It is an arithmetic number, because the mean of its divisors is an integer number (52604324568).

Almost surely, 2^210401004221 is an apocalyptic number.

It is an amenable number.

210401004221 is a deficient number, since it is larger than the sum of its proper divisors (16294051).

210401004221 is a wasteful number, since it uses less digits than its factorization.

210401004221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16294050.

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

Adding to 210401004221 its reverse (122400104012), we get a palindrome (332801108233).

The spelling of 210401004221 in words is "two hundred ten billion, four hundred one million, four thousand, two hundred twenty-one".