1221012202202 has 8 divisors (see below), whose sum is σ = 1972404326676. Its totient is φ = 563544093312.

The previous prime is 1221012202199. The next prime is 1221012202279. The reversal of 1221012202202 is 2022022101221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1216496496601 + 4515705601 = 1102949^2 + 67199^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 23481003863 + ... + 23481003914.

Almost surely, 2^{1221012202202} is an apocalyptic number.

1221012202202 is a deficient number, since it is larger than the sum of its proper divisors (751392124474).

1221012202202 is a wasteful number, since it uses less digits than its factorization.

1221012202202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46962007792.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1221012202202 its reverse (2022022101221), we get a palindrome (3243034303423).

The spelling of 1221012202202 in words is "one trillion, two hundred twenty-one billion, twelve million, two hundred two thousand, two hundred two".