121312212202 has 4 divisors (see below), whose sum is σ = 181968318306. Its totient is φ = 60656106100.

The previous prime is 121312212181. The next prime is 121312212209. The reversal of 121312212202 is 202212213121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 202212213121 = 19 ⋅10642748059.

It can be written as a sum of positive squares in only one way, i.e., 119155445721 + 2156766481 = 345189^2 + 46441^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 121312212202.

It is not an unprimeable number, because it can be changed into a prime (121312212209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30328053049 + ... + 30328053052.

Almost surely, 2^121312212202 is an apocalyptic number.

121312212202 is a deficient number, since it is larger than the sum of its proper divisors (60656106104).

121312212202 is an equidigital number, since it uses as much as digits as its factorization.

121312212202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60656106103.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 121312212202 its reverse (202212213121), we get a palindrome (323524425323).

The spelling of 121312212202 in words is "one hundred twenty-one billion, three hundred twelve million, two hundred twelve thousand, two hundred two".