211220212210 has 64 divisors (see below), whose sum is σ = 436461696000. Its totient is φ = 72093450240.

The previous prime is 211220212199. The next prime is 211220212241. The reversal of 211220212210 is 12212022112.

It is a happy number.

It is a super-2 number, since 2×211220212210² (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 31 ways as a sum of consecutive naturals, for example, 49452375 + ... + 49456645.

It is an arithmetic number, because the mean of its divisors is an integer number (6819714000).

Almost surely, 2^211220212210 is an apocalyptic number.

211220212210 is an abundant number, since it is smaller than the sum of its proper divisors (225241483790).

211220212210 is a wasteful number, since it uses less digits than its factorization.

211220212210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7291.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 211220212210 its reverse (12212022112), we get a palindrome (223432234322).

The spelling of 211220212210 in words is "two hundred eleven billion, two hundred twenty million, two hundred twelve thousand, two hundred ten".