20121201220202 has 4 divisors (see below), whose sum is σ = 30181801830306. Its totient is φ = 10060600610100.

The previous prime is 20121201220147. The next prime is 20121201220207. The reversal of 20121201220202 is 20202210212102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13670256523561 + 6450944696641 = 3697331^2 + 2539871^2 .

It is not an unprimeable number, because it can be changed into a prime (20121201220207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5030300305049 + ... + 5030300305052.

Almost surely, 2^{20121201220202} is an apocalyptic number.

20121201220202 is a deficient number, since it is larger than the sum of its proper divisors (10060600610104).

20121201220202 is a wasteful number, since it uses less digits than its factorization.

20121201220202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10060600610103.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20121201220202 its reverse (20202210212102), we get a palindrome (40323411432304).

The spelling of 20121201220202 in words is "twenty trillion, one hundred twenty-one billion, two hundred one million, two hundred twenty thousand, two hundred two".