102123211213 has 4 divisors (see below), whose sum is σ = 102125038428. Its totient is φ = 102121384000.

The previous prime is 102123211147. The next prime is 102123211217. The reversal of 102123211213 is 312112321201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312112321201 = 269141 ⋅1159661.

It can be written as a sum of positive squares in 2 ways, for example, as 9569143684 + 92554067529 = 97822^2 + 304227^2 .

It is a cyclic number.

It is not a de Polignac number, because 102123211213 - 2⁹ = 102123210701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102123211217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 827038 + ... + 942463.

It is an arithmetic number, because the mean of its divisors is an integer number (25531259607).

Almost surely, 2^102123211213 is an apocalyptic number.

It is an amenable number.

102123211213 is a deficient number, since it is larger than the sum of its proper divisors (1827215).

102123211213 is an equidigital number, since it uses as much as digits as its factorization.

102123211213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1827214.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 102123211213 its reverse (312112321201), we get a palindrome (414235532414).

The spelling of 102123211213 in words is "one hundred two billion, one hundred twenty-three million, two hundred eleven thousand, two hundred thirteen".