11312121202 has 4 divisors (see below), whose sum is σ = 16968181806. Its totient is φ = 5656060600.

The previous prime is 11312121193. The next prime is 11312121253. The reversal of 11312121202 is 20212121311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20212121311 = 61 ⋅331346251.

It can be written as a sum of positive squares in only one way, i.e., 9684724921 + 1627396281 = 98411^2 + 40341^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2828030299 + ... + 2828030302.

Almost surely, 2^11312121202 is an apocalyptic number.

11312121202 is a deficient number, since it is larger than the sum of its proper divisors (5656060604).

11312121202 is an equidigital number, since it uses as much as digits as its factorization.

11312121202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5656060603.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 11312121202 its reverse (20212121311), we get a palindrome (31524242513).

It can be divided in two parts, 11 and 312121202, that added together give a palindrome (312121213).

The spelling of 11312121202 in words is "eleven billion, three hundred twelve million, one hundred twenty-one thousand, two hundred two".