211212210222220 has 48 divisors (see below), whose sum is σ = 447884425497600. Its totient is φ = 83658568142016.

The previous prime is 211212210222187. The next prime is 211212210222239. The reversal of 211212210222220 is 22222012212112.

It is a super-2 number, since 2×211212210222220² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211212210222191 and 211212210222200.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24710809 + ... + 32141071.

It is an arithmetic number, because the mean of its divisors is an integer number (9330925531200).

Almost surely, 2^{211212210222220} is an apocalyptic number.

211212210222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211212210222220 is an abundant number, since it is smaller than the sum of its proper divisors (236672215275380).

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

211212210222220 is a wasteful number, since it uses less digits than its factorization.

211212210222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7444174 (or 7444172 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 211212210222220 its reverse (22222012212112), we get a palindrome (233434222434332).

The spelling of 211212210222220 in words is "two hundred eleven trillion, two hundred twelve billion, two hundred ten million, two hundred twenty-two thousand, two hundred twenty".