211220612 has 24 divisors (see below), whose sum is σ = 374740800. Its totient is φ = 104162400.

The previous prime is 211220599. The next prime is 211220621. The reversal of 211220612 is 216022112.

It is a super-2 number, since 2×211220612² = 89228293867309088, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88823 + ... + 91169.

It is an arithmetic number, because the mean of its divisors is an integer number (15614200).

Almost surely, 2^211220612 is an apocalyptic number.

It is an amenable number.

211220612 is a deficient number, since it is larger than the sum of its proper divisors (163520188).

211220612 is a wasteful number, since it uses less digits than its factorization.

211220612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2651 (or 2649 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 211220612 is about 14533.4308406515. The cubic root of 211220612 is about 595.5415938216.

Adding to 211220612 its reverse (216022112), we get a palindrome (427242724).

The spelling of 211220612 in words is "two hundred eleven million, two hundred twenty thousand, six hundred twelve".