102120001211 has 4 divisors (see below), whose sum is σ = 102558284712. Its totient is φ = 101681717712.

The previous prime is 102120001187. The next prime is 102120001213. The reversal of 102120001211 is 112100021201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112100021201 = 7 ⋅16014288743.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102120001211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102120001192 and 102120001201.

It is not an unprimeable number, because it can be changed into a prime (102120001213) 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 in 3 ways as a sum of consecutive naturals, for example, 219141401 + ... + 219141866.

It is an arithmetic number, because the mean of its divisors is an integer number (25639571178).

Almost surely, 2^102120001211 is an apocalyptic number.

102120001211 is a deficient number, since it is larger than the sum of its proper divisors (438283501).

102120001211 is an equidigital number, since it uses as much as digits as its factorization.

102120001211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438283500.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 102120001211 its reverse (112100021201), we get a palindrome (214220022412).

The spelling of 102120001211 in words is "one hundred two billion, one hundred twenty million, one thousand, two hundred eleven".