12121213202 has 20 divisors (see below), whose sum is σ = 21210869406. Its totient is φ = 5194803600.

The previous prime is 12121213199. The next prime is 12121213211. The reversal of 12121213202 is 20231212121.

It can be written as a sum of positive squares in only one way, i.e., 8315433721 + 3805779481 = 91189^2 + 61691^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1257299 + ... + 1266902.

Almost surely, 2^12121213202 is an apocalyptic number.

12121213202 is a deficient number, since it is larger than the sum of its proper divisors (9089656204).

12121213202 is an frugal number, since it uses more digits than its factorization.

12121213202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2524231 (or 2524210 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 12121213202 its reverse (20231212121), we get a palindrome (32352425323).

The spelling of 12121213202 in words is "twelve billion, one hundred twenty-one million, two hundred thirteen thousand, two hundred two".