1000210021020 has 72 divisors (see below), whose sum is σ = 3467394743904. Its totient is φ = 228619433088.

The previous prime is 1000210021003. The next prime is 1000210021079. The reversal of 1000210021020 is 201200120001.

1000210021020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1000210021020² (a number of 25 digits) contains 22 as substring.

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 = 1000210020993 and 1000210021011.

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, 396907479 + ... + 396909998.

It is an arithmetic number, because the mean of its divisors is an integer number (48158260332).

Almost surely, 2^{1000210021020} is an apocalyptic number.

1000210021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000210021020 is an abundant number, since it is smaller than the sum of its proper divisors (2467184722884).

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

1000210021020 is a wasteful number, since it uses less digits than its factorization.

1000210021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793817499 (or 793817494 counting only the distinct ones).

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

Adding to 1000210021020 its reverse (201200120001), we get a palindrome (1201410141021).

The spelling of 1000210021020 in words is "one trillion, two hundred ten million, twenty-one thousand, twenty".