212020121021100 has 144 divisors (see below), whose sum is σ = 725255034873600. Its totient is φ = 46790647384320.

The previous prime is 212020121021077. The next prime is 212020121021123. The reversal of 212020121021100 is 1120121020212.

It is an interprime number because it is at equal distance from previous prime (212020121021077) and next prime (212020121021123).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 212020121021100.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1740662590 + ... + 1740784389.

Almost surely, 2^{212020121021100} is an apocalyptic number.

212020121021100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212020121021100 is an abundant number, since it is smaller than the sum of its proper divisors (513234913852500).

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

212020121021100 is a wasteful number, since it uses less digits than its factorization.

212020121021100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3481447032 (or 3481447025 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 212020121021100 its reverse (1120121020212), we get a palindrome (213140242041312).

The spelling of 212020121021100 in words is "two hundred twelve trillion, twenty billion, one hundred twenty-one million, twenty-one thousand, one hundred".