20210122133 has 4 divisors (see below), whose sum is σ = 20220590208. Its totient is φ = 20199654060.

The previous prime is 20210122123. The next prime is 20210122139. The reversal of 20210122133 is 33122101202.

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 20210122133 - 2²⁴ = 20193344917 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 (20210122139) 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, 5231141 + ... + 5235002.

It is an arithmetic number, because the mean of its divisors is an integer number (5055147552).

Almost surely, 2^20210122133 is an apocalyptic number.

It is an amenable number.

20210122133 is a deficient number, since it is larger than the sum of its proper divisors (10468075).

20210122133 is a wasteful number, since it uses less digits than its factorization.

20210122133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10468074.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20210122133 its reverse (33122101202), we get a palindrome (53332223335).

The spelling of 20210122133 in words is "twenty billion, two hundred ten million, one hundred twenty-two thousand, one hundred thirty-three".