22111212020220 has 36 divisors (see below), whose sum is σ = 67070676461880. Its totient is φ = 5896323205344.

The previous prime is 22111212020203. The next prime is 22111212020239. The reversal of 22111212020220 is 2202021211122.

It is a happy number.

22111212020220 is a `hidden beast` number, since 2 + 211 + 1 + 212 + 0 + 20 + 220 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 22111212020193 and 22111212020202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61420033210 + ... + 61420033569.

Almost surely, 2^{22111212020220} is an apocalyptic number.

22111212020220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22111212020220 is an abundant number, since it is smaller than the sum of its proper divisors (44959464441660).

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

22111212020220 is a wasteful number, since it uses less digits than its factorization.

22111212020220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122840066794 (or 122840066789 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22111212020220 its reverse (2202021211122), we get a palindrome (24313233231342).

The spelling of 22111212020220 in words is "twenty-two trillion, one hundred eleven billion, two hundred twelve million, twenty thousand, two hundred twenty".