1243121102202 has 64 divisors (see below), whose sum is σ = 2995526467584. Its totient is φ = 336232512000.

The previous prime is 1243121102183. The next prime is 1243121102281. The reversal of 1243121102202 is 2022011213421.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6539674 + ... + 6727077.

It is an arithmetic number, because the mean of its divisors is an integer number (46805101056).

Almost surely, 2^{1243121102202} is an apocalyptic number.

1243121102202 is an abundant number, since it is smaller than the sum of its proper divisors (1752405365382).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1243121102202 is a wasteful number, since it uses less digits than its factorization.

1243121102202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13266883.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 1243121102202 its reverse (2022011213421), we get a palindrome (3265132315623).

The spelling of 1243121102202 in words is "one trillion, two hundred forty-three billion, one hundred twenty-one million, one hundred two thousand, two hundred two".