20200121222213 has 4 divisors (see below), whose sum is σ = 20531270750508. Its totient is φ = 19868971693920.

The previous prime is 20200121222153. The next prime is 20200121222243. The reversal of 20200121222213 is 31222212100202.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1697373825889 + 18502747396324 = 1302833^2 + 4301482^2 .

It is a cyclic number.

It is not a de Polignac number, because 20200121222213 - 2²⁰ = 20200120173637 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 (20200121222243) 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, 165574764056 + ... + 165574764177.

It is an arithmetic number, because the mean of its divisors is an integer number (5132817687627).

Almost surely, 2^{20200121222213} is an apocalyptic number.

It is an amenable number.

20200121222213 is a deficient number, since it is larger than the sum of its proper divisors (331149528295).

20200121222213 is an equidigital number, since it uses as much as digits as its factorization.

20200121222213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331149528294.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 20200121222213 its reverse (31222212100202), we get a palindrome (51422333322415).

The spelling of 20200121222213 in words is "twenty trillion, two hundred billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred thirteen".