22211222212220 has 48 divisors (see below), whose sum is σ = 49136940588960. Its totient is φ = 8410292884224.

The previous prime is 22211222212217. The next prime is 22211222212243. The reversal of 22211222212220 is 2221222211222.

It is a super-2 number, since 2×22211222212220² (a number of 27 digits) contains 22 as substring.

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, 22400639 + ... + 23371158.

It is an arithmetic number, because the mean of its divisors is an integer number (1023686262270).

Almost surely, 2^{22211222212220} is an apocalyptic number.

22211222212220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22211222212220 is an abundant number, since it is smaller than the sum of its proper divisors (26925718376740).

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

22211222212220 is a wasteful number, since it uses less digits than its factorization.

22211222212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45773102 (or 45773100 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 22211222212220 its reverse (2221222211222), we get a palindrome (24432444423442).

The spelling of 22211222212220 in words is "twenty-two trillion, two hundred eleven billion, two hundred twenty-two million, two hundred twelve thousand, two hundred twenty".