212100021122 has 16 divisors (see below), whose sum is σ = 347310698400. Its totient is φ = 96343007040.

The previous prime is 212100021097. The next prime is 212100021137. The reversal of 212100021122 is 221120001212.

It is a super-2 number, since 2×212100021122² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212100021097 and 212100021106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3271847 + ... + 3336042.

It is an arithmetic number, because the mean of its divisors is an integer number (21706918650).

Almost surely, 2^212100021122 is an apocalyptic number.

212100021122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

212100021122 is a deficient number, since it is larger than the sum of its proper divisors (135210677278).

212100021122 is a wasteful number, since it uses less digits than its factorization.

212100021122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6609361.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 212100021122 its reverse (221120001212), we get a palindrome (433220022334).

The spelling of 212100021122 in words is "two hundred twelve billion, one hundred million, twenty-one thousand, one hundred twenty-two".