1202120221221 has 12 divisors (see below), whose sum is σ = 1736410879372. Its totient is φ = 801406555776.

The previous prime is 1202120221199. The next prime is 1202120221223. The reversal of 1202120221221 is 1221220212021.

It is a happy number.

1202120221221 is a `hidden beast` number, since 1 + 202 + 1 + 20 + 221 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 539012930625 + 663107290596 = 734175^2 + 814314^2 .

It is not a de Polignac number, because 1202120221221 - 2⁵ = 1202120221189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1202120221194 and 1202120221203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202120221223) 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, 662445 + ... + 1686141.

Almost surely, 2^{1202120221221} is an apocalyptic number.

It is an amenable number.

1202120221221 is a deficient number, since it is larger than the sum of its proper divisors (534290658151).

1202120221221 is a wasteful number, since it uses less digits than its factorization.

1202120221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154180 (or 1154177 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1202120221221 its reverse (1221220212021), we get a palindrome (2423340433242).

The spelling of 1202120221221 in words is "one trillion, two hundred two billion, one hundred twenty million, two hundred twenty-one thousand, two hundred twenty-one".