20121123202 has 8 divisors (see below), whose sum is σ = 30751150716. Its totient is φ = 9870739632.

The previous prime is 20121123179. The next prime is 20121123203. The reversal of 20121123202 is 20232112102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15893392761 + 4227730441 = 126069^2 + 65021^2 .

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 (20121123203) 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, 94910853 + ... + 94911064.

Almost surely, 2^20121123202 is an apocalyptic number.

20121123202 is a deficient number, since it is larger than the sum of its proper divisors (10630027514).

20121123202 is a wasteful number, since it uses less digits than its factorization.

20121123202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189821972.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20121123202 its reverse (20232112102), we get a palindrome (40353235304).

The spelling of 20121123202 in words is "twenty billion, one hundred twenty-one million, one hundred twenty-three thousand, two hundred two".