20201210011221 has 16 divisors (see below), whose sum is σ = 26942807347200. Its totient is φ = 13463543351408.

The previous prime is 20201210011219. The next prime is 20201210011223. The reversal of 20201210011221 is 12211001210202.

It is an interprime number because it is at equal distance from previous prime (20201210011219) and next prime (20201210011223).

It is a cyclic number.

It is not a de Polignac number, because 20201210011221 - 2¹ = 20201210011219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20201210011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201210011223) 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, 426711370 + ... + 426758708.

It is an arithmetic number, because the mean of its divisors is an integer number (1683925459200).

Almost surely, 2^{20201210011221} is an apocalyptic number.

It is an amenable number.

20201210011221 is a deficient number, since it is larger than the sum of its proper divisors (6741597335979).

20201210011221 is a wasteful number, since it uses less digits than its factorization.

20201210011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85848.

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

Adding to 20201210011221 its reverse (12211001210202), we get a palindrome (32412211221423).

The spelling of 20201210011221 in words is "twenty trillion, two hundred one billion, two hundred ten million, eleven thousand, two hundred twenty-one".