11221012121211 has 6 divisors (see below), whose sum is σ = 16208128619540. Its totient is φ = 7480674747468.

The previous prime is 11221012121167. The next prime is 11221012121273. The reversal of 11221012121211 is 11212121012211.

It is a happy number.

11221012121211 is a `hidden beast` number, since 112 + 210 + 12 + 121 + 211 = 666.

It is not a de Polignac number, because 11221012121211 - 2¹³ = 11221012113019 is a prime.

It is a super-2 number, since 2×11221012121211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11221012121281) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 623389562281 + ... + 623389562298.

Almost surely, 2^{11221012121211} is an apocalyptic number.

11221012121211 is a deficient number, since it is larger than the sum of its proper divisors (4987116498329).

11221012121211 is a wasteful number, since it uses less digits than its factorization.

11221012121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246779124585 (or 1246779124582 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 11221012121211 its reverse (11212121012211), we get a palindrome (22433133133422).

The spelling of 11221012121211 in words is "eleven trillion, two hundred twenty-one billion, twelve million, one hundred twenty-one thousand, two hundred eleven".