2051211213 has 24 divisors (see below), whose sum is σ = 3000099960. Its totient is φ = 1350328320.

The previous prime is 2051211203. The next prime is 2051211223. The reversal of 2051211213 is 3121121502.

It is an interprime number because it is at equal distance from previous prime (2051211203) and next prime (2051211223).

It can be written as a sum of positive squares in 4 ways, for example, as 425266884 + 1625944329 = 20622^2 + 40323^2 .

It is not a de Polignac number, because 2051211213 - 2⁸ = 2051210957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051211203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 922443 + ... + 924663.

It is an arithmetic number, because the mean of its divisors is an integer number (125004165).

Almost surely, 2^2051211213 is an apocalyptic number.

It is an amenable number.

2051211213 is a deficient number, since it is larger than the sum of its proper divisors (948888747).

2051211213 is a wasteful number, since it uses less digits than its factorization.

2051211213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3469 (or 3466 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 2051211213 is about 45290.2993255730. The cubic root of 2051211213 is about 1270.5842297218.

Adding to 2051211213 its reverse (3121121502), we get a palindrome (5172332715).

The spelling of 2051211213 in words is "two billion, fifty-one million, two hundred eleven thousand, two hundred thirteen".