11221010012121 has 96 divisors (see below), whose sum is σ = 19571316645888. Its totient is φ = 5657491889280.

The previous prime is 11221010012111. The next prime is 11221010012171. The reversal of 11221010012121 is 12121001012211.

It is a happy number.

It is not a de Polignac number, because 11221010012121 - 2¹¹ = 11221010010073 is a prime.

It is a super-2 number, since 2×11221010012121² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11221010012121.

It is not an unprimeable number, because it can be changed into a prime (11221010012111) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 63511776 + ... + 63688206.

It is an arithmetic number, because the mean of its divisors is an integer number (203867881728).

Almost surely, 2^{11221010012121} is an apocalyptic number.

It is an amenable number.

11221010012121 is a deficient number, since it is larger than the sum of its proper divisors (8350306633767).

11221010012121 is a wasteful number, since it uses less digits than its factorization.

11221010012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177931 (or 177924 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11221010012121 its reverse (12121001012211), we get a palindrome (23342011024332).

The spelling of 11221010012121 in words is "eleven trillion, two hundred twenty-one billion, ten million, twelve thousand, one hundred twenty-one".