12211001220021 has 16 divisors (see below), whose sum is σ = 17239441083264. Its totient is φ = 7661635559424.

The previous prime is 12211001219993. The next prime is 12211001220043. The reversal of 12211001220021 is 12002210011221.

It is not a de Polignac number, because 12211001220021 - 2²⁶ = 12210934111157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211001210021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 289225 + ... + 4950318.

It is an arithmetic number, because the mean of its divisors is an integer number (1077465067704).

Almost surely, 2^{12211001220021} is an apocalyptic number.

It is an amenable number.

12211001220021 is a deficient number, since it is larger than the sum of its proper divisors (5028439863243).

12211001220021 is a wasteful number, since it uses less digits than its factorization.

12211001220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5285260.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12211001220021 its reverse (12002210011221), we get a palindrome (24213211231242).

The spelling of 12211001220021 in words is "twelve trillion, two hundred eleven billion, one million, two hundred twenty thousand, twenty-one".