121212221002 has 8 divisors (see below), whose sum is σ = 181925730756. Its totient is φ = 60570310752.

The previous prime is 121212220979. The next prime is 121212221003. The reversal of 121212221002 is 200122212121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 116806049361 + 4406171641 = 341769^2 + 66379^2 .

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 (121212221003) 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, 17895643 + ... + 17902414.

Almost surely, 2^121212221002 is an apocalyptic number.

121212221002 is a deficient number, since it is larger than the sum of its proper divisors (60713509754).

121212221002 is a wasteful number, since it uses less digits than its factorization.

121212221002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35799752.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121212221002 its reverse (200122212121), we get a palindrome (321334433123).

The spelling of 121212221002 in words is "one hundred twenty-one billion, two hundred twelve million, two hundred twenty-one thousand, two".