210122021020020 has 192 divisors, whose sum is σ = 610403955598080. Its totient is φ = 53972482969600.

The previous prime is 210122021019983. The next prime is 210122021020049. The reversal of 210122021020020 is 20020120221012.

210122021020020 is digitally balanced in base 2 and base 4, because in such bases 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 (15).

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, 142042990 + ... + 143514650.

It is an arithmetic number, because the mean of its divisors is an integer number (3179187268740).

Almost surely, 2^{210122021020020} is an apocalyptic number.

210122021020020 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 210122021020020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305201977799040).

210122021020020 is an abundant number, since it is smaller than the sum of its proper divisors (400281934578060).

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

210122021020020 is a wasteful number, since it uses less digits than its factorization.

210122021020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1472546 (or 1472544 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 210122021020020 its reverse (20020120221012), we get a palindrome (230142141241032).

The spelling of 210122021020020 in words is "two hundred ten trillion, one hundred twenty-two billion, twenty-one million, twenty thousand, twenty".