210011121012220 has 192 divisors, whose sum is σ = 536365982476800. Its totient is φ = 68075123466240.

The previous prime is 210011121012191. The next prime is 210011121012293. The reversal of 210011121012220 is 22210121110012.

It is a junction number, because it is equal to n+sod(n) for n = 210011121012194 and 210011121012203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 278818639 + ... + 279570841.

It is an arithmetic number, because the mean of its divisors is an integer number (2793572825400).

Almost surely, 2^{210011121012220} is an apocalyptic number.

210011121012220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210011121012220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268182991238400).

210011121012220 is an abundant number, since it is smaller than the sum of its proper divisors (326354861464580).

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

210011121012220 is a wasteful number, since it uses less digits than its factorization.

210011121012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756188 (or 756186 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 210011121012220 its reverse (22210121110012), we get a palindrome (232221242122232).

The spelling of 210011121012220 in words is "two hundred ten trillion, eleven billion, one hundred twenty-one million, twelve thousand, two hundred twenty".