2101261252 has 12 divisors (see below), whose sum is σ = 3696261436. Its totient is φ = 1045186560.

The previous prime is 2101261231. The next prime is 2101261271. The reversal of 2101261252 is 2521621012.

It can be written as a sum of positive squares in 2 ways, for example, as 640798596 + 1460462656 = 25314^2 + 38216^2 .

It is an unprimeable number.

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, 1360149 + ... + 1361692.

Almost surely, 2^2101261252 is an apocalyptic number.

It is an amenable number.

2101261252 is a deficient number, since it is larger than the sum of its proper divisors (1595000184).

2101261252 is a wasteful number, since it uses less digits than its factorization.

2101261252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2722038 (or 2722036 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 2101261252 is about 45839.5162714442. The cubic root of 2101261252 is about 1280.8354840023.

Adding to 2101261252 its reverse (2521621012), we get a palindrome (4622882264).

The spelling of 2101261252 in words is "two billion, one hundred one million, two hundred sixty-one thousand, two hundred fifty-two".