221210034013 has 4 divisors (see below), whose sum is σ = 221921320608. Its totient is φ = 220498747420.

The previous prime is 221210033981. The next prime is 221210034037. The reversal of 221210034013 is 310430012122.

It is a happy number.

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 221210034013 - 2⁵ = 221210033981 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 (221210034613) 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, 355642831 + ... + 355643452.

It is an arithmetic number, because the mean of its divisors is an integer number (55480330152).

Almost surely, 2^221210034013 is an apocalyptic number.

It is an amenable number.

221210034013 is a deficient number, since it is larger than the sum of its proper divisors (711286595).

221210034013 is an equidigital number, since it uses as much as digits as its factorization.

221210034013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711286594.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 221210034013 its reverse (310430012122), we get a palindrome (531640046135).

The spelling of 221210034013 in words is "two hundred twenty-one billion, two hundred ten million, thirty-four thousand, thirteen".