11012021222121 has 12 divisors (see below), whose sum is σ = 15908486679540. Its totient is φ = 7340316495360.

The previous prime is 11012021222107. The next prime is 11012021222123. The reversal of 11012021222121 is 12122212021011.

11012021222121 is a `hidden beast` number, since 110 + 120 + 212 + 221 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6280091132121 + 4731930090000 = 2506011^2 + 2175300^2 .

It is not a de Polignac number, because 11012021222121 - 2³⁵ = 10977661483753 is a prime.

It is a super-2 number, since 2×11012021222121² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11012021222094 and 11012021222103.

It is not an unprimeable number, because it can be changed into a prime (11012021222123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85847856 + ... + 85976033.

It is an arithmetic number, because the mean of its divisors is an integer number (1325707223295).

Almost surely, 2^{11012021222121} is an apocalyptic number.

It is an amenable number.

11012021222121 is a deficient number, since it is larger than the sum of its proper divisors (4896465457419).

11012021222121 is a wasteful number, since it uses less digits than its factorization.

11012021222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171831016 (or 171831013 counting only the distinct ones).

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

Adding to 11012021222121 its reverse (12122212021011), we get a palindrome (23134233243132).

The spelling of 11012021222121 in words is "eleven trillion, twelve billion, twenty-one million, two hundred twenty-two thousand, one hundred twenty-one".