211213012 has 6 divisors (see below), whose sum is σ = 369622778. Its totient is φ = 105606504.

The previous prime is 211213007. The next prime is 211213021. The reversal of 211213012 is 210312112.

It can be written as a sum of positive squares in only one way, i.e., 196112016 + 15100996 = 14004^2 + 3886^2 .

It is a super-2 number, since 2×211213012² = 89221872876224288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211212983 and 211213001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26401623 + ... + 26401630.

Almost surely, 2^211213012 is an apocalyptic number.

It is an amenable number.

211213012 is a deficient number, since it is larger than the sum of its proper divisors (158409766).

211213012 is a wasteful number, since it uses less digits than its factorization.

211213012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52803257 (or 52803255 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 211213012 is about 14533.1693721638. The cubic root of 211213012 is about 595.5344509416.

Adding to 211213012 its reverse (210312112), we get a palindrome (421525124).

The spelling of 211213012 in words is "two hundred eleven million, two hundred thirteen thousand, twelve".