212111110220 has 12 divisors (see below), whose sum is σ = 445433331504. Its totient is φ = 84844444080.

The previous prime is 212111110199. The next prime is 212111110291. The reversal of 212111110220 is 22011111212.

It is a super-2 number, since 2×212111110220² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212111110195 and 212111110204.

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 3 ways as a sum of consecutive naturals, for example, 5302777736 + ... + 5302777775.

It is an arithmetic number, because the mean of its divisors is an integer number (37119444292).

Almost surely, 2^212111110220 is an apocalyptic number.

212111110220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212111110220 is an abundant number, since it is smaller than the sum of its proper divisors (233322221284).

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

212111110220 is a wasteful number, since it uses less digits than its factorization.

212111110220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10605555520 (or 10605555518 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 212111110220 its reverse (22011111212), we get a palindrome (234122221432).

The spelling of 212111110220 in words is "two hundred twelve billion, one hundred eleven million, one hundred ten thousand, two hundred twenty".