20011222212220 has 48 divisors (see below), whose sum is σ = 42351148728000. Its totient is φ = 7942207969280.

The previous prime is 20011222212193. The next prime is 20011222212251. The reversal of 20011222212220 is 2221222211002.

It is a super-2 number, since 2×20011222212220² (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, 845776 + ... + 6382615.

It is an arithmetic number, because the mean of its divisors is an integer number (882315598500).

Almost surely, 2^{20011222212220} is an apocalyptic number.

20011222212220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011222212220 is an abundant number, since it is smaller than the sum of its proper divisors (22339926515780).

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

20011222212220 is a wasteful number, since it uses less digits than its factorization.

20011222212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7229478 (or 7229476 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20011222212220 its reverse (2221222211002), we get a palindrome (22232444423222).

The spelling of 20011222212220 in words is "twenty trillion, eleven billion, two hundred twenty-two million, two hundred twelve thousand, two hundred twenty".