20011211321 has 8 divisors (see below), whose sum is σ = 20058580224. Its totient is φ = 19963869120.

The previous prime is 20011211317. The next prime is 20011211323. The reversal of 20011211321 is 12311211002.

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 20011211321 - 2² = 20011211317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20011211296 and 20011211305.

It is not an unprimeable number, because it can be changed into a prime (20011211323) 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, 2871281 + ... + 2878241.

It is an arithmetic number, because the mean of its divisors is an integer number (2507322528).

Almost surely, 2^20011211321 is an apocalyptic number.

It is an amenable number.

20011211321 is a deficient number, since it is larger than the sum of its proper divisors (47368903).

20011211321 is an equidigital number, since it uses as much as digits as its factorization.

20011211321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13351.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 20011211321 its reverse (12311211002), we get a palindrome (32322422323).

The spelling of 20011211321 in words is "twenty billion, eleven million, two hundred eleven thousand, three hundred twenty-one".