20213123001 has 32 divisors (see below), whose sum is σ = 28830781440. Its totient is φ = 12559022784.

The previous prime is 20213122991. The next prime is 20213123027. The reversal of 20213123001 is 10032131202.

It is not a de Polignac number, because 20213123001 - 2¹¹ = 20213120953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20213123101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3292731 + ... + 3298863.

It is an arithmetic number, because the mean of its divisors is an integer number (900961920).

Almost surely, 2^20213123001 is an apocalyptic number.

It is an amenable number.

20213123001 is a deficient number, since it is larger than the sum of its proper divisors (8617658439).

20213123001 is a wasteful number, since it uses less digits than its factorization.

20213123001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7085.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20213123001 its reverse (10032131202), we get a palindrome (30245254203).

The spelling of 20213123001 in words is "twenty billion, two hundred thirteen million, one hundred twenty-three thousand, one".