20211120211220 has 48 divisors (see below), whose sum is σ = 42726988569216. Its totient is φ = 8030428560000.

The previous prime is 20211120211199. The next prime is 20211120211309. The reversal of 20211120211220 is 2211202111202.

It is a congruent number.

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, 52631510 + ... + 53014130.

It is an arithmetic number, because the mean of its divisors is an integer number (890145595192).

Almost surely, 2^{20211120211220} is an apocalyptic number.

20211120211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20211120211220 is an abundant number, since it is smaller than the sum of its proper divisors (22515868357996).

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

20211120211220 is a wasteful number, since it uses less digits than its factorization.

20211120211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400272 (or 400270 counting only the distinct ones).

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

Adding to 20211120211220 its reverse (2211202111202), we get a palindrome (22422322322422).

The spelling of 20211120211220 in words is "twenty trillion, two hundred eleven billion, one hundred twenty million, two hundred eleven thousand, two hundred twenty".