120021112211251 has 2 divisors, whose sum is σ = 120021112211252. Its totient is φ = 120021112211250.

The previous prime is 120021112211249. The next prime is 120021112211257. The reversal of 120021112211251 is 152112211120021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 120021112211251 - 2¹ = 120021112211249 is a prime.

It is a super-3 number, since 3×120021112211251³ (a number of 43 digits) contains 333 as substring.

Together with 120021112211249, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (120021112211257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60010556105625 + 60010556105626.

It is an arithmetic number, because the mean of its divisors is an integer number (60010556105626).

Almost surely, 2^{120021112211251} is an apocalyptic number.

120021112211251 is a deficient number, since it is larger than the sum of its proper divisors (1).

120021112211251 is an equidigital number, since it uses as much as digits as its factorization.

120021112211251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 22.

Adding to 120021112211251 its reverse (152112211120021), we get a palindrome (272133323331272).

The spelling of 120021112211251 in words is "one hundred twenty trillion, twenty-one billion, one hundred twelve million, two hundred eleven thousand, two hundred fifty-one".