12211211001021 has 32 divisors (see below), whose sum is σ = 17005074370560. Its totient is φ = 7785370665600.

The previous prime is 12211211001013. The next prime is 12211211001037. The reversal of 12211211001021 is 12010011211221.

It is a happy number.

It is not a de Polignac number, because 12211211001021 - 2³ = 12211211001013 is a prime.

It is a super-2 number, since 2×12211211001021² (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 (12211211001061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14582326 + ... + 15396968.

It is an arithmetic number, because the mean of its divisors is an integer number (531408574080).

Almost surely, 2^{12211211001021} is an apocalyptic number.

It is an amenable number.

12211211001021 is a deficient number, since it is larger than the sum of its proper divisors (4793863369539).

12211211001021 is a wasteful number, since it uses less digits than its factorization.

12211211001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816577.

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

Adding to 12211211001021 its reverse (12010011211221), we get a palindrome (24221222212242).

The spelling of 12211211001021 in words is "twelve trillion, two hundred eleven billion, two hundred eleven million, one thousand, twenty-one".