102120201221123 has 2 divisors, whose sum is σ = 102120201221124. Its totient is φ = 102120201221122.

The previous prime is 102120201221117. The next prime is 102120201221237. The reversal of 102120201221123 is 321122102021201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102120201221123 - 2²⁸ = 102119932785667 is a prime.

It is a super-2 number, since 2×102120201221123² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 102120201221095 and 102120201221104.

It is not a weakly prime, because it can be changed into another prime (102120201226123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51060100610561 + 51060100610562.

It is an arithmetic number, because the mean of its divisors is an integer number (51060100610562).

Almost surely, 2^{102120201221123} is an apocalyptic number.

102120201221123 is a deficient number, since it is larger than the sum of its proper divisors (1).

102120201221123 is an equidigital number, since it uses as much as digits as its factorization.

102120201221123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 102120201221123 its reverse (321122102021201), we get a palindrome (423242303242324).

The spelling of 102120201221123 in words is "one hundred two trillion, one hundred twenty billion, two hundred one million, two hundred twenty-one thousand, one hundred twenty-three".