10211121221011 has 4 divisors (see below), whose sum is σ = 10211132332024. Its totient is φ = 10211110110000.

The previous prime is 10211121220907. The next prime is 10211121221071. The reversal of 10211121221011 is 11012212111201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10211121221011 - 2³³ = 10202531286419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10211121221071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4039005 + ... + 6061006.

It is an arithmetic number, because the mean of its divisors is an integer number (2552783083006).

Almost surely, 2^{10211121221011} is an apocalyptic number.

10211121221011 is a deficient number, since it is larger than the sum of its proper divisors (11111013).

10211121221011 is a wasteful number, since it uses less digits than its factorization.

10211121221011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11111012.

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

Adding to 10211121221011 its reverse (11012212111201), we get a palindrome (21223333332212).

The spelling of 10211121221011 in words is "ten trillion, two hundred eleven billion, one hundred twenty-one million, two hundred twenty-one thousand, eleven".