2005121052 has 36 divisors (see below), whose sum is σ = 5529274296. Its totient is φ = 607612320.

The previous prime is 2005121017. The next prime is 2005121081. The reversal of 2005121052 is 2501215002.

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 2531323 + ... + 2532114.

Almost surely, 2^2005121052 is an apocalyptic number.

2005121052 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2005121052 is an abundant number, since it is smaller than the sum of its proper divisors (3524153244).

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

2005121052 is a wasteful number, since it uses less digits than its factorization.

2005121052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5063458 (or 5063453 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 2005121052 is about 44778.5780479908. The cubic root of 2005121052 is about 1260.9954869101.

Adding to 2005121052 its reverse (2501215002), we get a palindrome (4506336054).

The spelling of 2005121052 in words is "two billion, five million, one hundred twenty-one thousand, fifty-two".