102121323211 has 4 divisors (see below), whose sum is σ = 102650449432. Its totient is φ = 101592196992.

The previous prime is 102121323197. The next prime is 102121323299. The reversal of 102121323211 is 112323121201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102121323211 - 2²³ = 102112934603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102121323911) 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, 264562821 + ... + 264563206.

It is an arithmetic number, because the mean of its divisors is an integer number (25662612358).

Almost surely, 2^102121323211 is an apocalyptic number.

102121323211 is a deficient number, since it is larger than the sum of its proper divisors (529126221).

102121323211 is an equidigital number, since it uses as much as digits as its factorization.

102121323211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529126220.

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

Adding to 102121323211 its reverse (112323121201), we get a palindrome (214444444412).

The spelling of 102121323211 in words is "one hundred two billion, one hundred twenty-one million, three hundred twenty-three thousand, two hundred eleven".