20041221211 has 8 divisors (see below), whose sum is σ = 21912508224. Its totient is φ = 18178160520.

The previous prime is 20041221209. The next prime is 20041221227. The reversal of 20041221211 is 11212214002.

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

It is a cyclic number.

It is not a de Polignac number, because 20041221211 - 2¹ = 20041221209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20041227211) 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, 2051481 + ... + 2061226.

It is an arithmetic number, because the mean of its divisors is an integer number (2739063528).

Almost surely, 2^20041221211 is an apocalyptic number.

20041221211 is a deficient number, since it is larger than the sum of its proper divisors (1871287013).

20041221211 is a wasteful number, since it uses less digits than its factorization.

20041221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4113161.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20041221211 its reverse (11212214002), we get a palindrome (31253435213).

The spelling of 20041221211 in words is "twenty billion, forty-one million, two hundred twenty-one thousand, two hundred eleven".