20211222111220 has 48 divisors (see below), whose sum is σ = 49302128711808. Its totient is φ = 6815962488960.

The previous prime is 20211222111209. The next prime is 20211222111233. The reversal of 20211222111220 is 2211122211202.

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, 1183318282 + ... + 1183335361.

It is an arithmetic number, because the mean of its divisors is an integer number (1027127681496).

Almost surely, 2^{20211222111220} is an apocalyptic number.

20211222111220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20211222111220 is an abundant number, since it is smaller than the sum of its proper divisors (29090906600588).

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

20211222111220 is a wasteful number, since it uses less digits than its factorization.

20211222111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2366653720 (or 2366653718 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20211222111220 its reverse (2211122211202), we get a palindrome (22422344322422).

The spelling of 20211222111220 in words is "twenty trillion, two hundred eleven billion, two hundred twenty-two million, one hundred eleven thousand, two hundred twenty".