20112220211220 has 48 divisors (see below), whose sum is σ = 62571351769920. Its totient is φ = 5363258722848.

The previous prime is 20112220211117. The next prime is 20112220211263. The reversal of 20112220211220 is 2211202221102.

It is a happy number.

20112220211220 is a `hidden beast` number, since 2 + 0 + 1 + 12 + 220 + 211 + 220 = 666.

It is a super-2 number, since 2×20112220211220² (a number of 27 digits) contains 22 as substring.

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 = 20112220211193 and 20112220211202.

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, 18622425582 + ... + 18622426661.

It is an arithmetic number, because the mean of its divisors is an integer number (1303569828540).

Almost surely, 2^{20112220211220} is an apocalyptic number.

20112220211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20112220211220 is an abundant number, since it is smaller than the sum of its proper divisors (42459131558700).

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

20112220211220 is a wasteful number, since it uses less digits than its factorization.

20112220211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37244852261 (or 37244852253 counting only the distinct ones).

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

Adding to 20112220211220 its reverse (2211202221102), we get a palindrome (22323422432322).

The spelling of 20112220211220 in words is "twenty trillion, one hundred twelve billion, two hundred twenty million, two hundred eleven thousand, two hundred twenty".