11211012021020 has 96 divisors (see below), whose sum is σ = 27750976081920. Its totient is φ = 3724745414400.

The previous prime is 11211012020987. The next prime is 11211012021023. The reversal of 11211012021020 is 2012021011211.

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 = 11211012020986 and 11211012021004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211012021023) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 7770080 + ... + 9099239.

It is an arithmetic number, because the mean of its divisors is an integer number (289072667520).

Almost surely, 2^{11211012021020} is an apocalyptic number.

11211012021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11211012021020 is an abundant number, since it is smaller than the sum of its proper divisors (16539964060900).

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

11211012021020 is a wasteful number, since it uses less digits than its factorization.

11211012021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16869483 (or 16869481 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11211012021020 its reverse (2012021011211), we get a palindrome (13223033032231).

The spelling of 11211012021020 in words is "eleven trillion, two hundred eleven billion, twelve million, twenty-one thousand, twenty".