20121120202 has 16 divisors (see below), whose sum is σ = 32119302600. Its totient is φ = 9420694528.

The previous prime is 20121120191. The next prime is 20121120223. The reversal of 20121120202 is 20202112102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16600003281 + 3521116921 = 128841^2 + 59339^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1495327 + ... + 1508722.

Almost surely, 2^20121120202 is an apocalyptic number.

20121120202 is a deficient number, since it is larger than the sum of its proper divisors (11998182398).

20121120202 is a wasteful number, since it uses less digits than its factorization.

20121120202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3004265.

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

Adding to 20121120202 its reverse (20202112102), we get a palindrome (40323232304).

The spelling of 20121120202 in words is "twenty billion, one hundred twenty-one million, one hundred twenty thousand, two hundred two".