101223122220 has 144 divisors (see below), whose sum is σ = 344009641248. Its totient is φ = 23875706880.

The previous prime is 101223122149. The next prime is 101223122263. The reversal of 101223122220 is 22221322101.

101223122220 is a `hidden beast` number, since 10 + 122 + 312 + 2 + 220 = 666.

It is a super-2 number, since 2×101223122220² (a number of 23 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 = 101223122193 and 101223122202.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 617589 + ... + 764108.

It is an arithmetic number, because the mean of its divisors is an integer number (2388955842).

Almost surely, 2^101223122220 is an apocalyptic number.

101223122220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101223122220 is an abundant number, since it is smaller than the sum of its proper divisors (242786519028).

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

101223122220 is a wasteful number, since it uses less digits than its factorization.

101223122220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381760 (or 1381755 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 101223122220 its reverse (22221322101), we get a palindrome (123444444321).

The spelling of 101223122220 in words is "one hundred one billion, two hundred twenty-three million, one hundred twenty-two thousand, two hundred twenty".