20101202220 has 96 divisors (see below), whose sum is σ = 65011838976. Its totient is φ = 4586368000.

The previous prime is 20101202207. The next prime is 20101202227. The reversal of 20101202220 is 2220210102.

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 = 20101202196 and 20101202205.

It is not an unprimeable number, because it can be changed into a prime (20101202227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 884556 + ... + 906995.

It is an arithmetic number, because the mean of its divisors is an integer number (677206656).

Almost surely, 2^20101202220 is an apocalyptic number.

20101202220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20101202220 is an abundant number, since it is smaller than the sum of its proper divisors (44910636756).

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

20101202220 is a wasteful number, since it uses less digits than its factorization.

20101202220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1791591 (or 1791589 counting only the distinct ones).

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

Adding to 20101202220 its reverse (2220210102), we get a palindrome (22321412322).

The spelling of 20101202220 in words is "twenty billion, one hundred one million, two hundred two thousand, two hundred twenty".