20130211220 has 48 divisors (see below), whose sum is σ = 48327621888. Its totient is φ = 6899627520.

The previous prime is 20130211217. The next prime is 20130211237. The reversal of 20130211220 is 2211203102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 20130211195 and 20130211204.

It is a congruent number.

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, 464060 + ... + 505580.

It is an arithmetic number, because the mean of its divisors is an integer number (1006825456).

Almost surely, 2^20130211220 is an apocalyptic number.

20130211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20130211220 is an abundant number, since it is smaller than the sum of its proper divisors (28197410668).

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

20130211220 is a wasteful number, since it uses less digits than its factorization.

20130211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45000 (or 44998 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20130211220 its reverse (2211203102), we get a palindrome (22341414322).

The spelling of 20130211220 in words is "twenty billion, one hundred thirty million, two hundred eleven thousand, two hundred twenty".