1020000021210 has 96 divisors (see below), whose sum is σ = 2678744420352. Its totient is φ = 269266394880.

The previous prime is 1020000021169. The next prime is 1020000021247. The reversal of 1020000021210 is 121200000201.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1020000021192 and 1020000021201.

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, 5125875 + ... + 5321145.

It is an arithmetic number, because the mean of its divisors is an integer number (27903587712).

Almost surely, 2^{1020000021210} is an apocalyptic number.

1020000021210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1020000021210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1339372210176).

1020000021210 is an abundant number, since it is smaller than the sum of its proper divisors (1658744399142).

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

1020000021210 is a wasteful number, since it uses less digits than its factorization.

1020000021210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195868 (or 195865 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 1020000021210 its reverse (121200000201), we get a palindrome (1141200021411).

The spelling of 1020000021210 in words is "one trillion, twenty billion, twenty-one thousand, two hundred ten".