2021212121300 has 36 divisors (see below), whose sum is σ = 4537272733980. Its totient is φ = 780606059520.

The previous prime is 2021212121267. The next prime is 2021212121303. The reversal of 2021212121300 is 31212121202.

It can be written as a sum of positive squares in 6 ways, for example, as 446443130896 + 1574768990404 = 668164^2 + 1254898^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021212121303) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 348481949 + ... + 348487748.

Almost surely, 2^{2021212121300} is an apocalyptic number.

2021212121300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021212121300 is an abundant number, since it is smaller than the sum of its proper divisors (2516060612680).

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

2021212121300 is a wasteful number, since it uses less digits than its factorization.

2021212121300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696969740 (or 696969733 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 2021212121300 its reverse (31212121202), we get a palindrome (2052424242502).

The spelling of 2021212121300 in words is "two trillion, twenty-one billion, two hundred twelve million, one hundred twenty-one thousand, three hundred".