2001121052 has 48 divisors (see below), whose sum is σ = 4137369600. Its totient is φ = 829612080.

The previous prime is 2001121037. The next prime is 2001121091. The reversal of 2001121052 is 2501211002.

It is a Harshad number since it is a multiple of its sum of digits (14).

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, 832949 + ... + 835347.

It is an arithmetic number, because the mean of its divisors is an integer number (86195200).

Almost surely, 2^2001121052 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2001121052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2068684800).

2001121052 is an abundant number, since it is smaller than the sum of its proper divisors (2136248548).

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

2001121052 is an equidigital number, since it uses as much as digits as its factorization.

2001121052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2503 (or 2439 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 2001121052 is about 44733.8915365073. The cubic root of 2001121052 is about 1260.1564120936.

Adding to 2001121052 its reverse (2501211002), we get a palindrome (4502332054).

The spelling of 2001121052 in words is "two billion, one million, one hundred twenty-one thousand, fifty-two".