1221212010202 has 8 divisors (see below), whose sum is σ = 1839817221300. Its totient is φ = 607939603104.

The previous prime is 1221212010191. The next prime is 1221212010241. The reversal of 1221212010202 is 2020102121221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1197818613601 + 23393396601 = 1094449^2 + 152949^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1333200427 + ... + 1333201342.

Almost surely, 2^{1221212010202} is an apocalyptic number.

1221212010202 is a deficient number, since it is larger than the sum of its proper divisors (618605211098).

1221212010202 is a wasteful number, since it uses less digits than its factorization.

1221212010202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2666402000.

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

Adding to 1221212010202 its reverse (2020102121221), we get a palindrome (3241314131423).

The spelling of 1221212010202 in words is "one trillion, two hundred twenty-one billion, two hundred twelve million, ten thousand, two hundred two".