211202021122220 has 24 divisors (see below), whose sum is σ = 443627799111504. Its totient is φ = 84461083733696.

The previous prime is 211202021122199. The next prime is 211202021122273. The reversal of 211202021122220 is 22221120202112.

It is a super-2 number, since 2×211202021122220² (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 = 211202021122192 and 211202021122201.

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, 1232706899 + ... + 1232878218.

It is an arithmetic number, because the mean of its divisors is an integer number (18484491629646).

Almost surely, 2^{211202021122220} is an apocalyptic number.

211202021122220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211202021122220 is an abundant number, since it is smaller than the sum of its proper divisors (232425777989284).

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

211202021122220 is a wasteful number, since it uses less digits than its factorization.

211202021122220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2465589409 (or 2465589407 counting only the distinct ones).

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

Adding to 211202021122220 its reverse (22221120202112), we get a palindrome (233423141324332).

The spelling of 211202021122220 in words is "two hundred eleven trillion, two hundred two billion, twenty-one million, one hundred twenty-two thousand, two hundred twenty".