210122212122020 has 144 divisors (see below), whose sum is σ = 489998105554944. Its totient is φ = 75626329363200.

The previous prime is 210122212121947. The next prime is 210122212122041. The reversal of 210122212122020 is 20221212221012.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 210122212121983 and 210122212122001.

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, 128578169 + ... + 130202111.

Almost surely, 2^{210122212122020} is an apocalyptic number.

210122212122020 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 210122212122020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244999052777472).

210122212122020 is an abundant number, since it is smaller than the sum of its proper divisors (279875893432924).

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

210122212122020 is a wasteful number, since it uses less digits than its factorization.

210122212122020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1624522 (or 1624509 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 210122212122020 its reverse (20221212221012), we get a palindrome (230343424343032).

The spelling of 210122212122020 in words is "two hundred ten trillion, one hundred twenty-two billion, two hundred twelve million, one hundred twenty-two thousand, twenty".