211221221022110 has 48 divisors (see below), whose sum is σ = 418671769556880. Its totient is φ = 76667520084480.

The previous prime is 211221221022047. The next prime is 211221221022143. The reversal of 211221221022110 is 11220122122112.

It is a super-2 number, since 2×211221221022110² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1059078011 + ... + 1059277430.

It is an arithmetic number, because the mean of its divisors is an integer number (8722328532435).

Almost surely, 2^{211221221022110} is an apocalyptic number.

211221221022110 is a deficient number, since it is larger than the sum of its proper divisors (207450548534770).

211221221022110 is a wasteful number, since it uses less digits than its factorization.

211221221022110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2118355533 (or 2118355520 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 211221221022110 its reverse (11220122122112), we get a palindrome (222441343144222).

The spelling of 211221221022110 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred twenty-one million, twenty-two thousand, one hundred ten".