2111221110204 has 48 divisors (see below), whose sum is σ = 5510271396000. Its totient is φ = 699017275008.

The previous prime is 2111221110151. The next prime is 2111221110217. The reversal of 2111221110204 is 4020111221112.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65582377 + ... + 65614560.

It is an arithmetic number, because the mean of its divisors is an integer number (114797320750).

Almost surely, 2^{2111221110204} is an apocalyptic number.

It is an amenable number.

2111221110204 is an abundant number, since it is smaller than the sum of its proper divisors (3399050285796).

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

2111221110204 is a wasteful number, since it uses less digits than its factorization.

2111221110204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131197099 (or 131197091 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 2111221110204 its reverse (4020111221112), we get a palindrome (6131332331316).

The spelling of 2111221110204 in words is "two trillion, one hundred eleven billion, two hundred twenty-one million, one hundred ten thousand, two hundred four".