1021202021100 has 72 divisors (see below), whose sum is σ = 2983932172368. Its totient is φ = 269624288000.

The previous prime is 1021202021093. The next prime is 1021202021101. The reversal of 1021202021100 is 11202021201.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (1021202021101) 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, 16821219 + ... + 16881818.

It is an arithmetic number, because the mean of its divisors is an integer number (41443502394).

Almost surely, 2^{1021202021100} is an apocalyptic number.

1021202021100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021202021100 is an abundant number, since it is smaller than the sum of its proper divisors (1962730151268).

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

1021202021100 is a wasteful number, since it uses less digits than its factorization.

1021202021100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33703155 (or 33703148 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1021202021100 its reverse (11202021201), we get a palindrome (1032404042301).

The spelling of 1021202021100 in words is "one trillion, twenty-one billion, two hundred two million, twenty-one thousand, one hundred".