210011121122220 has 144 divisors (see below), whose sum is σ = 699945503362560. Its totient is φ = 50545515024000.

The previous prime is 210011121122137. The next prime is 210011121122237. The reversal of 210011121122220 is 22221121110012.

210011121122220 is a `hidden beast` number, since 2 + 100 + 111 + 211 + 22 + 220 = 666.

210011121122220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 = 210011121122193 and 210011121122202.

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, 381257956 + ... + 381808395.

It is an arithmetic number, because the mean of its divisors is an integer number (4860732662240).

Almost surely, 2^{210011121122220} is an apocalyptic number.

210011121122220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210011121122220 is an abundant number, since it is smaller than the sum of its proper divisors (489934382240340).

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

210011121122220 is a wasteful number, since it uses less digits than its factorization.

210011121122220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763066516 (or 763066511 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 210011121122220 its reverse (22221121110012), we get a palindrome (232232242232232).

The spelling of 210011121122220 in words is "two hundred ten trillion, eleven billion, one hundred twenty-one million, one hundred twenty-two thousand, two hundred twenty".