11211111021020 has 96 divisors (see below), whose sum is σ = 24289054372800. Its totient is φ = 4344044912640.

The previous prime is 11211111020987. The next prime is 11211111021023. The reversal of 11211111021020 is 2012011111211.

It is a super-2 number, since 2×11211111021020² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11211111020986 and 11211111021004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211111021023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82702256 + ... + 82837704.

It is an arithmetic number, because the mean of its divisors is an integer number (253010983050).

Almost surely, 2^{11211111021020} is an apocalyptic number.

11211111021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11211111021020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12144527186400).

11211111021020 is an abundant number, since it is smaller than the sum of its proper divisors (13077943351780).

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

11211111021020 is a wasteful number, since it uses less digits than its factorization.

11211111021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136215 (or 136213 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 11211111021020 its reverse (2012011111211), we get a palindrome (13223122132231).

The spelling of 11211111021020 in words is "eleven trillion, two hundred eleven billion, one hundred eleven million, twenty-one thousand, twenty".