2051221052 has 24 divisors (see below), whose sum is σ = 3816390816. Its totient is φ = 962506688.

The previous prime is 2051220967. The next prime is 2051221061. The reversal of 2051221052 is 2501221502.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205463 + ... + 215214.

It is an arithmetic number, because the mean of its divisors is an integer number (159016284).

Almost surely, 2^2051221052 is an apocalyptic number.

It is an amenable number.

2051221052 is a deficient number, since it is larger than the sum of its proper divisors (1765169764).

2051221052 is a wasteful number, since it uses less digits than its factorization.

2051221052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420757 (or 420755 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 2051221052 is about 45290.4079469373. The cubic root of 2051221052 is about 1270.5862612464.

Adding to 2051221052 its reverse (2501221502), we get a palindrome (4552442554).

The spelling of 2051221052 in words is "two billion, fifty-one million, two hundred twenty-one thousand, fifty-two".