102100021121 has 8 divisors (see below), whose sum is σ = 116687674944. Its totient is φ = 87512851440.

The previous prime is 102100021103. The next prime is 102100021169. The reversal of 102100021121 is 121120001201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102100021121 - 2¹⁰ = 102100020097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102100021181) 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 7 ways as a sum of consecutive naturals, for example, 727166 + ... + 856136.

It is an arithmetic number, because the mean of its divisors is an integer number (14585959368).

Almost surely, 2^102100021121 is an apocalyptic number.

It is an amenable number.

102100021121 is a deficient number, since it is larger than the sum of its proper divisors (14587653823).

102100021121 is a wasteful number, since it uses less digits than its factorization.

102100021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242071.

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

Adding to 102100021121 its reverse (121120001201), we get a palindrome (223220022322).

The spelling of 102100021121 in words is "one hundred two billion, one hundred million, twenty-one thousand, one hundred twenty-one".