212100121222 has 16 divisors (see below), whose sum is σ = 347486630400. Its totient is φ = 96294228040.

The previous prime is 212100121193. The next prime is 212100121241. The reversal of 212100121222 is 222121001212.

It is a happy number.

It is a super-2 number, since 2×212100121222² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212100121196 and 212100121205.

It is a congruent number.

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, 5727022 + ... + 5763937.

It is an arithmetic number, because the mean of its divisors is an integer number (21717914400).

Almost surely, 2^212100121222 is an apocalyptic number.

212100121222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

212100121222 is a deficient number, since it is larger than the sum of its proper divisors (135386509178).

212100121222 is a wasteful number, since it uses less digits than its factorization.

212100121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11491811.

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

Adding to 212100121222 its reverse (222121001212), we get a palindrome (434221122434).

It can be divided in two parts, 2121001212 and 22, that multiplied together give a palindrome (46662026664).

The spelling of 212100121222 in words is "two hundred twelve billion, one hundred million, one hundred twenty-one thousand, two hundred twenty-two".