1021020212200 has 24 divisors (see below), whose sum is σ = 2373871993830. Its totient is φ = 408408084800.

The previous prime is 1021020212161. The next prime is 1021020212203. The reversal of 1021020212200 is 22120201201.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 798381564484 + 222638647716 = 893522^2 + 471846^2 .

It is not an unprimeable number, because it can be changed into a prime (1021020212203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2552550331 + ... + 2552550730.

Almost surely, 2^{1021020212200} is an apocalyptic number.

1021020212200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021020212200 is an abundant number, since it is smaller than the sum of its proper divisors (1352851781630).

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

1021020212200 is a wasteful number, since it uses less digits than its factorization.

1021020212200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5105101077 (or 5105101068 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1021020212200 its reverse (22120201201), we get a palindrome (1043140413401).

The spelling of 1021020212200 in words is "one trillion, twenty-one billion, twenty million, two hundred twelve thousand, two hundred".