20012011201221 has 8 divisors (see below), whose sum is σ = 28735195571040. Its totient is φ = 12315083816112.

The previous prime is 20012011201183. The next prime is 20012011201261. The reversal of 20012011201221 is 12210211021002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20012011201221 - 2¹⁸ = 20012010939077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20012011201221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012011201261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256564246131 + ... + 256564246208.

It is an arithmetic number, because the mean of its divisors is an integer number (3591899446380).

Almost surely, 2^{20012011201221} is an apocalyptic number.

It is an amenable number.

20012011201221 is a deficient number, since it is larger than the sum of its proper divisors (8723184369819).

20012011201221 is a wasteful number, since it uses less digits than its factorization.

20012011201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513128492355.

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

Adding to 20012011201221 its reverse (12210211021002), we get a palindrome (32222222222223).

The spelling of 20012011201221 in words is "twenty trillion, twelve billion, eleven million, two hundred one thousand, two hundred twenty-one".