120021211100221 has 2 divisors, whose sum is σ = 120021211100222. Its totient is φ = 120021211100220.

The previous prime is 120021211100117. The next prime is 120021211100233. The reversal of 120021211100221 is 122001112120021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107756233524900 + 12264977575321 = 10380570^2 + 3502139^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120021211100221 is a prime.

It is a super-2 number, since 2×120021211100221² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 120021211100195 and 120021211100204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120021211101221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60010605550110 + 60010605550111.

It is an arithmetic number, because the mean of its divisors is an integer number (60010605550111).

Almost surely, 2^{120021211100221} is an apocalyptic number.

It is an amenable number.

120021211100221 is a deficient number, since it is larger than the sum of its proper divisors (1).

120021211100221 is an equidigital number, since it uses as much as digits as its factorization.

120021211100221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 120021211100221 its reverse (122001112120021), we get a palindrome (242022323220242).

The spelling of 120021211100221 in words is "one hundred twenty trillion, twenty-one billion, two hundred eleven million, one hundred thousand, two hundred twenty-one".