20002121223 has 16 divisors (see below), whose sum is σ = 30499023360. Its totient is φ = 11422433376.

The previous prime is 20002121203. The next prime is 20002121231. The reversal of 20002121223 is 32212120002.

It is a happy number.

It is not a de Polignac number, because 20002121223 - 2²² = 19997926919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002121203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 272740 + ... + 338217.

It is an arithmetic number, because the mean of its divisors is an integer number (1906188960).

Almost surely, 2^20002121223 is an apocalyptic number.

20002121223 is a deficient number, since it is larger than the sum of its proper divisors (10496902137).

20002121223 is a wasteful number, since it uses less digits than its factorization.

20002121223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612526.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20002121223 its reverse (32212120002), we get a palindrome (52214241225).

The spelling of 20002121223 in words is "twenty billion, two million, one hundred twenty-one thousand, two hundred twenty-three".