1021202020100 has 72 divisors (see below), whose sum is σ = 2222035572288. Its totient is φ = 407371363200.

The previous prime is 1021202020099. The next prime is 1021202020183. The reversal of 1021202020100 is 10202021201.

It is a happy 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, 56860322 + ... + 56878278.

Almost surely, 2^{1021202020100} is an apocalyptic number.

1021202020100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021202020100 is an abundant number, since it is smaller than the sum of its proper divisors (1200833552188).

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

1021202020100 is a wasteful number, since it uses less digits than its factorization.

1021202020100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19485 (or 19478 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1021202020100 its reverse (10202021201), we get a palindrome (1031404041301).

The spelling of 1021202020100 in words is "one trillion, twenty-one billion, two hundred two million, twenty thousand, one hundred".