1020002021100 has 108 divisors (see below), whose sum is σ = 3365410233640. Its totient is φ = 257684716800.

The previous prime is 1020002021089. The next prime is 1020002021107. The reversal of 1020002021100 is 11202000201.

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 (1020002021107) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 29807521 + ... + 29841720.

Almost surely, 2^{1020002021100} is an apocalyptic number.

1020002021100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020002021100 is an abundant number, since it is smaller than the sum of its proper divisors (2345408212540).

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

1020002021100 is a wasteful number, since it uses less digits than its factorization.

1020002021100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59649280 (or 59649270 counting only the distinct ones).

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

Adding to 1020002021100 its reverse (11202000201), we get a palindrome (1031204021301).

The spelling of 1020002021100 in words is "one trillion, twenty billion, two million, twenty-one thousand, one hundred".