11220021122121 has 24 divisors (see below), whose sum is σ = 18595732244544. Its totient is φ = 6385897044000.

The previous prime is 11220021122083. The next prime is 11220021122147. The reversal of 11220021122121 is 12122112002211.

11220021122121 is a `hidden beast` number, since 1 + 12 + 200 + 211 + 221 + 21 = 666.

11220021122121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11220021122121 - 2¹³ = 11220021113929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11220021122094 and 11220021122103.

It is not an unprimeable number, because it can be changed into a prime (11220021122171) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 354756246 + ... + 354787871.

It is an arithmetic number, because the mean of its divisors is an integer number (774822176856).

Almost surely, 2^{11220021122121} is an apocalyptic number.

It is an amenable number.

11220021122121 is a deficient number, since it is larger than the sum of its proper divisors (7375711122423).

11220021122121 is a wasteful number, since it uses less digits than its factorization.

11220021122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709544381 (or 709544378 counting only the distinct ones).

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

Adding to 11220021122121 its reverse (12122112002211), we get a palindrome (23342133124332).

The spelling of 11220021122121 in words is "eleven trillion, two hundred twenty billion, twenty-one million, one hundred twenty-two thousand, one hundred twenty-one".