1203221212101 has 12 divisors (see below), whose sum is σ = 1738308532428. Its totient is φ = 801998703744.

The previous prime is 1203221212093. The next prime is 1203221212111. The reversal of 1203221212101 is 1012121223021.

1203221212101 is a `hidden beast` number, since 12 + 0 + 322 + 121 + 210 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1160672249025 + 42548963076 = 1077345^2 + 206274^2 .

It is not a de Polignac number, because 1203221212101 - 2³ = 1203221212093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1203221212111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12346350 + ... + 12443423.

It is an arithmetic number, because the mean of its divisors is an integer number (144859044369).

Almost surely, 2^{1203221212101} is an apocalyptic number.

It is an amenable number.

1203221212101 is a deficient number, since it is larger than the sum of its proper divisors (535087320327).

1203221212101 is a wasteful number, since it uses less digits than its factorization.

1203221212101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24795172 (or 24795169 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1203221212101 its reverse (1012121223021), we get a palindrome (2215342435122).

The spelling of 1203221212101 in words is "one trillion, two hundred three billion, two hundred twenty-one million, two hundred twelve thousand, one hundred one".