2400220406221 has 4 divisors (see below), whose sum is σ = 2618422261344. Its totient is φ = 2182018551100.

The previous prime is 2400220406209. The next prime is 2400220406231. The reversal of 2400220406221 is 1226040220042.

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 2400220406221 - 2¹¹ = 2400220404173 is a prime.

It is a super-2 number, since 2×2400220406221² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2400220406231) 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, 109100927545 + ... + 109100927566.

It is an arithmetic number, because the mean of its divisors is an integer number (654605565336).

Almost surely, 2^{2400220406221} is an apocalyptic number.

It is an amenable number.

2400220406221 is a deficient number, since it is larger than the sum of its proper divisors (218201855123).

2400220406221 is a wasteful number, since it uses less digits than its factorization.

2400220406221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218201855122.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 2400220406221 its reverse (1226040220042), we get a palindrome (3626260626263).

The spelling of 2400220406221 in words is "two trillion, four hundred billion, two hundred twenty million, four hundred six thousand, two hundred twenty-one".