120021303012221 has 4 divisors (see below), whose sum is σ = 129253710936252. Its totient is φ = 110788895088192.

The previous prime is 120021303012151. The next prime is 120021303012229. The reversal of 120021303012221 is 122210303120021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 49905549556996 + 70115753455225 = 7064386^2 + 8373515^2 .

It is a cyclic number.

It is not a de Polignac number, because 120021303012221 - 2³⁸ = 119746425105277 is a prime.

It is a super-2 number, since 2×120021303012221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120021303012193 and 120021303012202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120021303012229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4616203961996 + ... + 4616203962021.

It is an arithmetic number, because the mean of its divisors is an integer number (32313427734063).

Almost surely, 2^{120021303012221} is an apocalyptic number.

It is an amenable number.

120021303012221 is a deficient number, since it is larger than the sum of its proper divisors (9232407924031).

120021303012221 is an equidigital number, since it uses as much as digits as its factorization.

120021303012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9232407924030.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 120021303012221 its reverse (122210303120021), we get a palindrome (242231606132242).

The spelling of 120021303012221 in words is "one hundred twenty trillion, twenty-one billion, three hundred three million, twelve thousand, two hundred twenty-one".