102121211211 has 16 divisors (see below), whose sum is σ = 136512288000. Its totient is φ = 67905564768.

The previous prime is 102121211197. The next prime is 102121211239. The reversal of 102121211211 is 112112121201.

It is a happy number.

It is not a de Polignac number, because 102121211211 - 2⁶ = 102121211147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102121211281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5388925 + ... + 5407841.

It is an arithmetic number, because the mean of its divisors is an integer number (8532018000).

Almost surely, 2^102121211211 is an apocalyptic number.

102121211211 is a deficient number, since it is larger than the sum of its proper divisors (34391076789).

102121211211 is a wasteful number, since it uses less digits than its factorization.

102121211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23458.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 102121211211 its reverse (112112121201), we get a palindrome (214233332412).

The spelling of 102121211211 in words is "one hundred two billion, one hundred twenty-one million, two hundred eleven thousand, two hundred eleven".