11220120021021 has 16 divisors (see below), whose sum is σ = 15171462609408. Its totient is φ = 7374437002800.

The previous prime is 11220120021001. The next prime is 11220120021029. The reversal of 11220120021021 is 12012002102211.

It is not a de Polignac number, because 11220120021021 - 2⁹ = 11220120020509 is a prime.

It is a super-2 number, since 2×11220120021021² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220120021029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4467210 + ... + 6511236.

It is an arithmetic number, because the mean of its divisors is an integer number (948216413088).

Almost surely, 2^{11220120021021} is an apocalyptic number.

It is an amenable number.

11220120021021 is a deficient number, since it is larger than the sum of its proper divisors (3951342588387).

11220120021021 is a wasteful number, since it uses less digits than its factorization.

11220120021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2069872.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 11220120021021 its reverse (12012002102211), we get a palindrome (23232122123232).

The spelling of 11220120021021 in words is "eleven trillion, two hundred twenty billion, one hundred twenty million, twenty-one thousand, twenty-one".