2121011010 has 96 divisors (see below), whose sum is σ = 5940200448. Its totient is φ = 523543680.

The previous prime is 2121010973. The next prime is 2121011071. The reversal of 2121011010 is 101101212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 2121010983 and 2121011001.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 47644 + ... + 80696.

It is an arithmetic number, because the mean of its divisors is an integer number (61877088).

Almost surely, 2^2121011010 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2121011010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2970100224).

2121011010 is an abundant number, since it is smaller than the sum of its proper divisors (3819189438).

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

2121011010 is a wasteful number, since it uses less digits than its factorization.

2121011010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33120 (or 33117 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 2121011010 is about 46054.4352912941. The cubic root of 2121011010 is about 1284.8358352358.

Adding to 2121011010 its reverse (101101212), we get a palindrome (2222112222).

The spelling of 2121011010 in words is "two billion, one hundred twenty-one million, eleven thousand, ten".