2121101244 has 18 divisors (see below), whose sum is σ = 5361672680. Its totient is φ = 707033736.

The previous prime is 2121101197. The next prime is 2121101261. The reversal of 2121101244 is 4421011212.

It is a tau number, because it is divible by the number of its divisors (18).

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 5 ways as a sum of consecutive naturals, for example, 29459704 + ... + 29459775.

Almost surely, 2^2121101244 is an apocalyptic number.

It is an amenable number.

2121101244 is an abundant number, since it is smaller than the sum of its proper divisors (3240571436).

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

2121101244 is a wasteful number, since it uses less digits than its factorization.

2121101244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58919489 (or 58919484 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 2121101244 is about 46055.4149259346. The cubic root of 2121101244 is about 1284.8540551998.

Adding to 2121101244 its reverse (4421011212), we get a palindrome (6542112456).

The spelling of 2121101244 in words is "two billion, one hundred twenty-one million, one hundred one thousand, two hundred forty-four".