211222122120020 has 48 divisors (see below), whose sum is σ = 484785117524736. Its totient is φ = 76666070160000.

The previous prime is 211222122120019. The next prime is 211222122120041. The reversal of 211222122120020 is 20021221222112.

It is a super-2 number, since 2×211222122120020² (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 = 211222122119974 and 211222122120001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 887219756 + ... + 887457795.

It is an arithmetic number, because the mean of its divisors is an integer number (10099689948432).

Almost surely, 2^{211222122120020} is an apocalyptic number.

211222122120020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211222122120020 is an abundant number, since it is smaller than the sum of its proper divisors (273562995404716).

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

211222122120020 is a wasteful number, since it uses less digits than its factorization.

211222122120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1774678112 (or 1774678110 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 211222122120020 its reverse (20021221222112), we get a palindrome (231243343342132).

The spelling of 211222122120020 in words is "two hundred eleven trillion, two hundred twenty-two billion, one hundred twenty-two million, one hundred twenty thousand, twenty".