20001212122 has 8 divisors (see below), whose sum is σ = 30733569972. Its totient is φ = 9756688800.

The previous prime is 20001212107. The next prime is 20001212129. The reversal of 20001212122 is 22121210002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19589081521 + 412130601 = 139961^2 + 20301^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20001212129) 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, 121958529 + ... + 121958692.

Almost surely, 2^20001212122 is an apocalyptic number.

20001212122 is a deficient number, since it is larger than the sum of its proper divisors (10732357850).

20001212122 is a wasteful number, since it uses less digits than its factorization.

20001212122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243917264.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20001212122 its reverse (22121210002), we get a palindrome (42122422124).

The spelling of 20001212122 in words is "twenty billion, one million, two hundred twelve thousand, one hundred twenty-two".