11221122121020 has 144 divisors (see below), whose sum is σ = 39285037891008. Its totient is φ = 2539433548800.

The previous prime is 11221122120977. The next prime is 11221122121063. The reversal of 11221122121020 is 2012122112211.

11221122121020 is a `hidden beast` number, since 1 + 1 + 2 + 211 + 221 + 210 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (11221122120977) and next prime (11221122121063).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 11221122120984 and 11221122121002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 43960129 + ... + 44214648.

It is an arithmetic number, because the mean of its divisors is an integer number (272812763132).

Almost surely, 2^{11221122121020} is an apocalyptic number.

11221122121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221122121020 is an abundant number, since it is smaller than the sum of its proper divisors (28063915769988).

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

11221122121020 is a wasteful number, since it uses less digits than its factorization.

11221122121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88174900 (or 88174895 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 11221122121020 its reverse (2012122112211), we get a palindrome (13233244233231).

The spelling of 11221122121020 in words is "eleven trillion, two hundred twenty-one billion, one hundred twenty-two million, one hundred twenty-one thousand, twenty".