102120111211211 has 2 divisors, whose sum is σ = 102120111211212. Its totient is φ = 102120111211210.

The previous prime is 102120111211207. The next prime is 102120111211241. The reversal of 102120111211211 is 112112111021201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102120111211211 - 2² = 102120111211207 is a prime.

It is a super-2 number, since 2×102120111211211² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 102120111211211.

It is not a weakly prime, because it can be changed into another prime (102120111211241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51060055605605 + 51060055605606.

It is an arithmetic number, because the mean of its divisors is an integer number (51060055605606).

Almost surely, 2^{102120111211211} is an apocalyptic number.

102120111211211 is a deficient number, since it is larger than the sum of its proper divisors (1).

102120111211211 is an equidigital number, since it uses as much as digits as its factorization.

102120111211211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 102120111211211 its reverse (112112111021201), we get a palindrome (214232222232412).

It can be divided in two parts, 1021201 and 11211211, that multiplied together give a palindrome (11448899884411).

The spelling of 102120111211211 in words is "one hundred two trillion, one hundred twenty billion, one hundred eleven million, two hundred eleven thousand, two hundred eleven".