2101221044 has 48 divisors (see below), whose sum is σ = 4157207040. Its totient is φ = 922561920.

The previous prime is 2101221043. The next prime is 2101221047. The reversal of 2101221044 is 4401221012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101221041) 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, 84062 + ... + 106154.

It is an arithmetic number, because the mean of its divisors is an integer number (86608480).

Almost surely, 2^2101221044 is an apocalyptic number.

It is an amenable number.

2101221044 is a deficient number, since it is larger than the sum of its proper divisors (2055985996).

2101221044 is a wasteful number, since it uses less digits than its factorization.

2101221044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22200 (or 22198 counting only the distinct ones).

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

The square root of 2101221044 is about 45839.0776957827. The cubic root of 2101221044 is about 1280.8273142802.

Adding to 2101221044 its reverse (4401221012), we get a palindrome (6502442056).

The spelling of 2101221044 in words is "two billion, one hundred one million, two hundred twenty-one thousand, forty-four".