11012121111220 has 48 divisors (see below), whose sum is σ = 24009248345040. Its totient is φ = 4237603421184.

The previous prime is 11012121111209. The next prime is 11012121111247. The reversal of 11012121111220 is 2211112121011.

It can be written as a sum of positive squares in 8 ways, for example, as 851046840484 + 10161074270736 = 922522^2 + 3187644^2 .

It is a super-2 number, since 2×11012121111220² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11012121111194 and 11012121111203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34110849 + ... + 34432168.

It is an arithmetic number, because the mean of its divisors is an integer number (500192673855).

Almost surely, 2^{11012121111220} is an apocalyptic number.

11012121111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11012121111220 is an abundant number, since it is smaller than the sum of its proper divisors (12997127233820).

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

11012121111220 is a wasteful number, since it uses less digits than its factorization.

11012121111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68543332 (or 68543330 counting only the distinct ones).

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

Adding to 11012121111220 its reverse (2211112121011), we get a palindrome (13223233232231).

The spelling of 11012121111220 in words is "eleven trillion, twelve billion, one hundred twenty-one million, one hundred eleven thousand, two hundred twenty".