11101021221020 has 24 divisors (see below), whose sum is σ = 23312872170000. Its totient is φ = 4440269896832.

The previous prime is 11101021221019. The next prime is 11101021221097. The reversal of 11101021221020 is 2012212010111.

It is a junction number, because it is equal to n+sod(n) for n = 11101021220986 and 11101021221004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8003945 + ... + 9287904.

It is an arithmetic number, because the mean of its divisors is an integer number (971369673750).

Almost surely, 2^{11101021221020} is an apocalyptic number.

11101021221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11101021221020 is an abundant number, since it is smaller than the sum of its proper divisors (12211850948980).

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

11101021221020 is a wasteful number, since it uses less digits than its factorization.

11101021221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17323957 (or 17323955 counting only the distinct ones).

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

Adding to 11101021221020 its reverse (2012212010111), we get a palindrome (13113233231131).

The spelling of 11101021221020 in words is "eleven trillion, one hundred one billion, twenty-one million, two hundred twenty-one thousand, twenty".