211221102122 has 16 divisors (see below), whose sum is σ = 324214059840. Its totient is φ = 103149964512.

The previous prime is 211221102067. The next prime is 211221102137. The reversal of 211221102122 is 221201122112.

It is a super-2 number, since 2×211221102122² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211221102122.

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, 2775779 + ... + 2850857.

It is an arithmetic number, because the mean of its divisors is an integer number (20263378740).

Almost surely, 2^211221102122 is an apocalyptic number.

211221102122 is a deficient number, since it is larger than the sum of its proper divisors (112992957718).

211221102122 is a wasteful number, since it uses less digits than its factorization.

211221102122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107837.

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

Adding to 211221102122 its reverse (221201122112), we get a palindrome (432422224234).

The spelling of 211221102122 in words is "two hundred eleven billion, two hundred twenty-one million, one hundred two thousand, one hundred twenty-two".