210120122120220 has 72 divisors (see below), whose sum is σ = 686392398933696. Its totient is φ = 51721876213632.

The previous prime is 210120122120203. The next prime is 210120122120263. The reversal of 210120122120220 is 22021221021012.

It is a happy number.

210120122120220 is a `hidden beast` number, since 2 + 1 + 0 + 1 + 201 + 221 + 20 + 220 = 666.

It is a super-2 number, since 2×210120122120220² (a number of 29 digits) contains 22 as substring.

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 = 210120122120193 and 210120122120202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44897459652 + ... + 44897464331.

It is an arithmetic number, because the mean of its divisors is an integer number (9533227762968).

Almost surely, 2^{210120122120220} is an apocalyptic number.

210120122120220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210120122120220 is an abundant number, since it is smaller than the sum of its proper divisors (476272276813476).

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

210120122120220 is a wasteful number, since it uses less digits than its factorization.

210120122120220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89794924011 (or 89794924006 counting only the distinct ones).

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

Adding to 210120122120220 its reverse (22021221021012), we get a palindrome (232141343141232).

The spelling of 210120122120220 in words is "two hundred ten trillion, one hundred twenty billion, one hundred twenty-two million, one hundred twenty thousand, two hundred twenty".