20211121221011 has 8 divisors (see below), whose sum is σ = 23098506179424. Its totient is φ = 17323756744320.

The previous prime is 20211121221007. The next prime is 20211121221017. The reversal of 20211121221011 is 11012212111202.

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 20211121221011 - 2² = 20211121221007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20211121221017) 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, 2944220 + ... + 7006473.

It is an arithmetic number, because the mean of its divisors is an integer number (2887313272428).

Almost surely, 2^{20211121221011} is an apocalyptic number.

20211121221011 is a deficient number, since it is larger than the sum of its proper divisors (2887384958413).

20211121221011 is an equidigital number, since it uses as much as digits as its factorization.

20211121221011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10240861.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 20211121221011 its reverse (11012212111202), we get a palindrome (31223333332213).

The spelling of 20211121221011 in words is "twenty trillion, two hundred eleven billion, one hundred twenty-one million, two hundred twenty-one thousand, eleven".