211221022222210 has 256 divisors, whose sum is σ = 514337969553408. Its totient is φ = 60312758630400.

The previous prime is 211221022222157. The next prime is 211221022222253. The reversal of 211221022222210 is 12222220122112.

It is a super-2 number, since 2×211221022222210² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 715877815 + ... + 716172805.

It is an arithmetic number, because the mean of its divisors is an integer number (2009132693568).

Almost surely, 2^{211221022222210} is an apocalyptic number.

211221022222210 is an abundant number, since it is smaller than the sum of its proper divisors (303116947331198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211221022222210 is a wasteful number, since it uses less digits than its factorization.

211221022222210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295569.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 211221022222210 its reverse (12222220122112), we get a palindrome (223443242344322).

The spelling of 211221022222210 in words is "two hundred eleven trillion, two hundred twenty-one billion, twenty-two million, two hundred twenty-two thousand, two hundred ten".