211012020021220 has 48 divisors (see below), whose sum is σ = 493694660406528. Its totient is φ = 75099055477760.

The previous prime is 211012020021199. The next prime is 211012020021221. The reversal of 211012020021220 is 22120020210112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 211012020021194 and 211012020021203.

It is not an unprimeable number, because it can be changed into a prime (211012020021221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10203665677 + ... + 10203686356.

It is an arithmetic number, because the mean of its divisors is an integer number (10285305425136).

Almost surely, 2^{211012020021220} is an apocalyptic number.

211012020021220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211012020021220 is an abundant number, since it is smaller than the sum of its proper divisors (282682640385308).

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

211012020021220 is a wasteful number, since it uses less digits than its factorization.

211012020021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20407352100 (or 20407352098 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 211012020021220 its reverse (22120020210112), we get a palindrome (233132040231332).

The spelling of 211012020021220 in words is "two hundred eleven trillion, twelve billion, twenty million, twenty-one thousand, two hundred twenty".