221022012211220 has 48 divisors (see below), whose sum is σ = 506389735853568. Its totient is φ = 80363958456960.

The previous prime is 221022012211213. The next prime is 221022012211229. The reversal of 221022012211220 is 22112210220122.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 221022012211192 and 221022012211201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221022012211229) 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, 45707579 + ... + 50311298.

It is an arithmetic number, because the mean of its divisors is an integer number (10549786163616).

Almost surely, 2^{221022012211220} is an apocalyptic number.

221022012211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221022012211220 is an abundant number, since it is smaller than the sum of its proper divisors (285367723642348).

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

221022012211220 is a wasteful number, since it uses less digits than its factorization.

221022012211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96029360 (or 96029358 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221022012211220 its reverse (22112210220122), we get a palindrome (243134222431342).

The spelling of 221022012211220 in words is "two hundred twenty-one trillion, twenty-two billion, twelve million, two hundred eleven thousand, two hundred twenty".