211122212221020 has 48 divisors (see below), whose sum is σ = 625915264470048. Its totient is φ = 52987535616000.

The previous prime is 211122212220989. The next prime is 211122212221027. The reversal of 211122212221020 is 20122212221112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211122212221027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103491279481 + ... + 103491281520.

It is an arithmetic number, because the mean of its divisors is an integer number (13039901343126).

Almost surely, 2^{211122212221020} is an apocalyptic number.

211122212221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211122212221020 is an abundant number, since it is smaller than the sum of its proper divisors (414793052249028).

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

211122212221020 is a wasteful number, since it uses less digits than its factorization.

211122212221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206982561030 (or 206982561028 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 211122212221020 its reverse (20122212221112), we get a palindrome (231244424442132).

The spelling of 211122212221020 in words is "two hundred eleven trillion, one hundred twenty-two billion, two hundred twelve million, two hundred twenty-one thousand, twenty".