2121102040 has 16 divisors (see below), whose sum is σ = 4772479680. Its totient is φ = 848440800.

The previous prime is 2121102001. The next prime is 2121102041. The reversal of 2121102040 is 402011212.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121102040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121102041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26513736 + ... + 26513815.

It is an arithmetic number, because the mean of its divisors is an integer number (298279980).

Almost surely, 2^2121102040 is an apocalyptic number.

2121102040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121102040 is an abundant number, since it is smaller than the sum of its proper divisors (2651377640).

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

2121102040 is a wasteful number, since it uses less digits than its factorization.

2121102040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53027562 (or 53027558 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2121102040 is about 46055.4235676972. The cubic root of 2121102040 is about 1284.8542159251.

Adding to 2121102040 its reverse (402011212), we get a palindrome (2523113252).

The spelling of 2121102040 in words is "two billion, one hundred twenty-one million, one hundred two thousand, forty".