20212011021220 has 24 divisors (see below), whose sum is σ = 42533835321600. Its totient is φ = 8067925898592.

The previous prime is 20212011021203. The next prime is 20212011021239. The reversal of 20212011021220 is 2212011021202.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20212011021194 and 20212011021203.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1054897050 + ... + 1054916209.

It is an arithmetic number, because the mean of its divisors is an integer number (1772243138400).

Almost surely, 2^{20212011021220} is an apocalyptic number.

20212011021220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20212011021220 is an abundant number, since it is smaller than the sum of its proper divisors (22321824300380).

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

20212011021220 is a wasteful number, since it uses less digits than its factorization.

20212011021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2109813747 (or 2109813745 counting only the distinct ones).

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

Adding to 20212011021220 its reverse (2212011021202), we get a palindrome (22424022042422).

The spelling of 20212011021220 in words is "twenty trillion, two hundred twelve billion, eleven million, twenty-one thousand, two hundred twenty".