211222221202020 has 192 divisors, whose sum is σ = 688678807896576. Its totient is φ = 47367425064960.

The previous prime is 211222221202019. The next prime is 211222221202021. The reversal of 211222221202020 is 20202122222112.

It is an interprime number because it is at equal distance from previous prime (211222221202019) and next prime (211222221202021).

It is a super-2 number, since 2×211222221202020² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (211222221202021) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1654232580 + ... + 1654360260.

It is an arithmetic number, because the mean of its divisors is an integer number (3586868791128).

Almost surely, 2^{211222221202020} is an apocalyptic number.

211222221202020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211222221202020 is an abundant number, since it is smaller than the sum of its proper divisors (477456586694556).

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

211222221202020 is a wasteful number, since it uses less digits than its factorization.

211222221202020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202070 (or 202068 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 211222221202020 its reverse (20202122222112), we get a palindrome (231424343424132).

The spelling of 211222221202020 in words is "two hundred eleven trillion, two hundred twenty-two billion, two hundred twenty-one million, two hundred two thousand, twenty".