20003211123 has 16 divisors (see below), whose sum is σ = 30486501120. Its totient is φ = 11428374816.

The previous prime is 20003211119. The next prime is 20003211127. The reversal of 20003211123 is 32111230002.

It is an interprime number because it is at equal distance from previous prime (20003211119) and next prime (20003211127).

It is not a de Polignac number, because 20003211123 - 2² = 20003211119 is a prime.

It is a super-2 number, since 2×20003211123² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20003211127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40633 + ... + 204101.

It is an arithmetic number, because the mean of its divisors is an integer number (1905406320).

Almost surely, 2^20003211123 is an apocalyptic number.

20003211123 is a deficient number, since it is larger than the sum of its proper divisors (10483289997).

20003211123 is a wasteful number, since it uses less digits than its factorization.

20003211123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169306.

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

Adding to 20003211123 its reverse (32111230002), we get a palindrome (52114441125).

It can be divided in two parts, 2000 and 3211123, that added together give a palindrome (3213123).

The spelling of 20003211123 in words is "twenty billion, three million, two hundred eleven thousand, one hundred twenty-three".