211211022211220 has 48 divisors (see below), whose sum is σ = 449165468505600. Its totient is φ = 83413527824640.

The previous prime is 211211022211207. The next prime is 211211022211243. The reversal of 211211022211220 is 22112220112112.

It is a super-2 number, since 2×211211022211220² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 211211022211192 and 211211022211201.

It is a congruent number.

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, 91573760 + ... + 93851880.

It is an arithmetic number, because the mean of its divisors is an integer number (9357613927200).

Almost surely, 2^{211211022211220} is an apocalyptic number.

211211022211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211211022211220 is an abundant number, since it is smaller than the sum of its proper divisors (237954446294380).

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

211211022211220 is a wasteful number, since it uses less digits than its factorization.

211211022211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2336888 (or 2336886 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 211211022211220 its reverse (22112220112112), we get a palindrome (233323242323332).

The spelling of 211211022211220 in words is "two hundred eleven trillion, two hundred eleven billion, twenty-two million, two hundred eleven thousand, two hundred twenty".