20211121022213 has 4 divisors (see below), whose sum is σ = 22048495660608. Its totient is φ = 18373746383820.

The previous prime is 20211121022159. The next prime is 20211121022221. The reversal of 20211121022213 is 31222012111202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20211121022213 - 2⁶ = 20211121022149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211121022263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 918687319181 + ... + 918687319202.

It is an arithmetic number, because the mean of its divisors is an integer number (5512123915152).

Almost surely, 2^{20211121022213} is an apocalyptic number.

It is an amenable number.

20211121022213 is a deficient number, since it is larger than the sum of its proper divisors (1837374638395).

20211121022213 is a wasteful number, since it uses less digits than its factorization.

20211121022213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1837374638394.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 20211121022213 its reverse (31222012111202), we get a palindrome (51433133133415).

The spelling of 20211121022213 in words is "twenty trillion, two hundred eleven billion, one hundred twenty-one million, twenty-two thousand, two hundred thirteen".