211120220221020 has 144 divisors (see below), whose sum is σ = 698620543875072. Its totient is φ = 51180326670720.

The previous prime is 211120220220953. The next prime is 211120220221129. The reversal of 211120220221020 is 20122022021112.

It is a happy number.

211120220221020 is a `hidden beast` number, since 21 + 11 + 202 + 202 + 210 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 211120220220984 and 211120220221002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 455768449 + ... + 456231431.

It is an arithmetic number, because the mean of its divisors is an integer number (4851531554688).

Almost surely, 2^{211120220221020} is an apocalyptic number.

211120220221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211120220221020 is an abundant number, since it is smaller than the sum of its proper divisors (487500323654052).

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

211120220221020 is a wasteful number, since it uses less digits than its factorization.

211120220221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693312 (or 693307 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 211120220221020 its reverse (20122022021112), we get a palindrome (231242242242132).

The spelling of 211120220221020 in words is "two hundred eleven trillion, one hundred twenty billion, two hundred twenty million, two hundred twenty-one thousand, twenty".