2211021220404 has 48 divisors (see below), whose sum is σ = 5430955335680. Its totient is φ = 698168769120.

The previous prime is 2211021220381. The next prime is 2211021220409. The reversal of 2211021220404 is 4040221201122.

It is a super-2 number, since 2×2211021220404² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211021220409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3029517 + ... + 3687819.

Almost surely, 2^{2211021220404} is an apocalyptic number.

It is an amenable number.

2211021220404 is an abundant number, since it is smaller than the sum of its proper divisors (3219934115276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2211021220404 is a wasteful number, since it uses less digits than its factorization.

2211021220404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673060 (or 673058 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 2211021220404 its reverse (4040221201122), we get a palindrome (6251242421526).

The spelling of 2211021220404 in words is "two trillion, two hundred eleven billion, twenty-one million, two hundred twenty thousand, four hundred four".