11213021020 has 24 divisors (see below), whose sum is σ = 23691813264. Its totient is φ = 4457690496.

The previous prime is 11213020993. The next prime is 11213021021. The reversal of 11213021020 is 2012031211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11213021021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1716529 + ... + 1723048.

It is an arithmetic number, because the mean of its divisors is an integer number (987158886).

Almost surely, 2^11213021020 is an apocalyptic number.

11213021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11213021020 is an abundant number, since it is smaller than the sum of its proper divisors (12478792244).

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

11213021020 is a wasteful number, since it uses less digits than its factorization.

11213021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3439749 (or 3439747 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 11213021020 its reverse (2012031211), we get a palindrome (13225052231).

The spelling of 11213021020 in words is "eleven billion, two hundred thirteen million, twenty-one thousand, twenty".