211212221210 has 16 divisors (see below), whose sum is σ = 380219083776. Its totient is φ = 84476647248.

The previous prime is 211212221201. The next prime is 211212221221. The reversal of 211212221210 is 12122212112.

It is a super-2 number, since 2×211212221210² (a number of 23 digits) contains 22 as substring.

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, 921974 + ... + 1128033.

It is an arithmetic number, because the mean of its divisors is an integer number (23763692736).

Almost surely, 2^211212221210 is an apocalyptic number.

211212221210 is a deficient number, since it is larger than the sum of its proper divisors (169006862566).

211212221210 is a wasteful number, since it uses less digits than its factorization.

211212221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2060317.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 211212221210 its reverse (12122212112), we get a palindrome (223334433322).

The spelling of 211212221210 in words is "two hundred eleven billion, two hundred twelve million, two hundred twenty-one thousand, two hundred ten".