1210021000002 has 48 divisors (see below), whose sum is σ = 2628322044192. Its totient is φ = 402324229440.

The previous prime is 1210020999989. The next prime is 1210021000007. The reversal of 1210021000002 is 2000001200121.

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

It is not an unprimeable number, because it can be changed into a prime (1210021000007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18854773 + ... + 18918839.

It is an arithmetic number, because the mean of its divisors is an integer number (54756709254).

Almost surely, 2^{1210021000002} is an apocalyptic number.

1210021000002 is an abundant number, since it is smaller than the sum of its proper divisors (1418301044190).

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

1210021000002 is a wasteful number, since it uses less digits than its factorization.

1210021000002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66703 (or 66700 counting only the distinct ones).

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

Adding to 1210021000002 its reverse (2000001200121), we get a palindrome (3210022200123).

The spelling of 1210021000002 in words is "one trillion, two hundred ten billion, twenty-one million, two", and thus it is an aban number.