212121200211020 has 48 divisors (see below), whose sum is σ = 464823619884288. Its totient is φ = 81159151803840.

The previous prime is 212121200210999. The next prime is 212121200211073. The reversal of 212121200211020 is 20112002121212.

It is a self number, because there is not a number n which added to its sum of digits gives 212121200211020.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198136007 + ... + 199203713.

It is an arithmetic number, because the mean of its divisors is an integer number (9683825414256).

Almost surely, 2^{212121200211020} is an apocalyptic number.

212121200211020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212121200211020 is an abundant number, since it is smaller than the sum of its proper divisors (252702419673268).

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

212121200211020 is a wasteful number, since it uses less digits than its factorization.

212121200211020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1499630 (or 1499628 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 212121200211020 its reverse (20112002121212), we get a palindrome (232233202332232).

The spelling of 212121200211020 in words is "two hundred twelve trillion, one hundred twenty-one billion, two hundred million, two hundred eleven thousand, twenty".