120202011221 has 2 divisors, whose sum is σ = 120202011222. Its totient is φ = 120202011220.

The previous prime is 120202011203. The next prime is 120202011233. The reversal of 120202011221 is 122110202021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83818356196 + 36383655025 = 289514^2 + 190745^2 .

It is an emirp because it is prime and its reverse (122110202021) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120202011221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120202011196 and 120202011205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120202011271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60101005610 + 60101005611.

It is an arithmetic number, because the mean of its divisors is an integer number (60101005611).

Almost surely, 2^120202011221 is an apocalyptic number.

It is an amenable number.

120202011221 is a deficient number, since it is larger than the sum of its proper divisors (1).

120202011221 is an equidigital number, since it uses as much as digits as its factorization.

120202011221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 120202011221 its reverse (122110202021), we get a palindrome (242312213242).

The spelling of 120202011221 in words is "one hundred twenty billion, two hundred two million, eleven thousand, two hundred twenty-one".