20211002220 has 48 divisors (see below), whose sum is σ = 56597119488. Its totient is φ = 5388999360.

The previous prime is 20211002191. The next prime is 20211002243. The reversal of 20211002220 is 2220011202.

It is a super-2 number, since 2×20211002220² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20211002196 and 20211002205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 874615 + ... + 897425.

It is an arithmetic number, because the mean of its divisors is an integer number (1179106656).

Almost surely, 2^20211002220 is an apocalyptic number.

20211002220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20211002220 is an abundant number, since it is smaller than the sum of its proper divisors (36386117268).

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

20211002220 is a wasteful number, since it uses less digits than its factorization.

20211002220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37590 (or 37588 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20211002220 its reverse (2220011202), we get a palindrome (22431013422).

The spelling of 20211002220 in words is "twenty billion, two hundred eleven million, two thousand, two hundred twenty".