102121122211 has 4 divisors (see below), whose sum is σ = 102121791912. Its totient is φ = 102120452512.

The previous prime is 102121122209. The next prime is 102121122223. The reversal of 102121122211 is 112221121201.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 102121122211 - 2¹ = 102121122209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102121122251) 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, 17400 + ... + 452266.

It is an arithmetic number, because the mean of its divisors is an integer number (25530447978).

Almost surely, 2^102121122211 is an apocalyptic number.

102121122211 is a deficient number, since it is larger than the sum of its proper divisors (669701).

102121122211 is an equidigital number, since it uses as much as digits as its factorization.

102121122211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669700.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 102121122211 its reverse (112221121201), we get a palindrome (214342243412).

The spelling of 102121122211 in words is "one hundred two billion, one hundred twenty-one million, one hundred twenty-two thousand, two hundred eleven".