1221001001202 has 32 divisors (see below), whose sum is σ = 2585854088064. Its totient is φ = 383028780800.

The previous prime is 1221001001189. The next prime is 1221001001221. The reversal of 1221001001202 is 2021001001221.

It is a super-3 number, since 3×1221001001202³ (a number of 37 digits) contains 333 as substring.

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 15 ways as a sum of consecutive naturals, for example, 836752 + ... + 1772612.

It is an arithmetic number, because the mean of its divisors is an integer number (80807940252).

Almost surely, 2^{1221001001202} is an apocalyptic number.

1221001001202 is an abundant number, since it is smaller than the sum of its proper divisors (1364853086862).

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

1221001001202 is a wasteful number, since it uses less digits than its factorization.

1221001001202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948674.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1221001001202 its reverse (2021001001221), we get a palindrome (3242002002423).

The spelling of 1221001001202 in words is "one trillion, two hundred twenty-one billion, one million, one thousand, two hundred two".