212111020001220 has 48 divisors (see below), whose sum is σ = 593911499142528. Its totient is φ = 56562877415680.

The previous prime is 212111020001213. The next prime is 212111020001233. The reversal of 212111020001220 is 22100020111212.

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 212111020001220.

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, 92192497 + ... + 94465223.

It is an arithmetic number, because the mean of its divisors is an integer number (12373156232136).

Almost surely, 2^{212111020001220} is an apocalyptic number.

212111020001220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212111020001220 is an abundant number, since it is smaller than the sum of its proper divisors (381800479141308).

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

212111020001220 is a wasteful number, since it uses less digits than its factorization.

212111020001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3828220 (or 3828218 counting only the distinct ones).

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

Adding to 212111020001220 its reverse (22100020111212), we get a palindrome (234211040112432).

The spelling of 212111020001220 in words is "two hundred twelve trillion, one hundred eleven billion, twenty million, one thousand, two hundred twenty".