1221202011202 has 16 divisors (see below), whose sum is σ = 1856946908952. Its totient is φ = 602220165120.

The previous prime is 1221202011179. The next prime is 1221202011221. The reversal of 1221202011202 is 2021102021221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1192291470241 + 28910540961 = 1091921^2 + 170031^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6598002 + ... + 6780562.

Almost surely, 2^{1221202011202} is an apocalyptic number.

1221202011202 is a deficient number, since it is larger than the sum of its proper divisors (635744897750).

1221202011202 is a wasteful number, since it uses less digits than its factorization.

1221202011202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228453.

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

Adding to 1221202011202 its reverse (2021102021221), we get a palindrome (3242304032423).

The spelling of 1221202011202 in words is "one trillion, two hundred twenty-one billion, two hundred two million, eleven thousand, two hundred two".