20211030221220 has 120 divisors (see below), whose sum is σ = 67132324002744. Its totient is φ = 5072572283904.

The previous prime is 20211030221191. The next prime is 20211030221233. The reversal of 20211030221220 is 2212203011202.

20211030221220 is a `hidden beast` number, since 20 + 2 + 110 + 302 + 212 + 20 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4152400609536 + 16058629611684 = 2037744^2 + 4007322^2 .

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 = 20211030221193 and 20211030221202.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 366912007 + ... + 366967086.

Almost surely, 2^{20211030221220} is an apocalyptic number.

20211030221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20211030221220 is an abundant number, since it is smaller than the sum of its proper divisors (46921293781524).

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

20211030221220 is a wasteful number, since it uses less digits than its factorization.

20211030221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733879131 (or 733879120 counting only the distinct ones).

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

Adding to 20211030221220 its reverse (2212203011202), we get a palindrome (22423233232422).

The spelling of 20211030221220 in words is "twenty trillion, two hundred eleven billion, thirty million, two hundred twenty-one thousand, two hundred twenty".