102011213121 has 32 divisors (see below), whose sum is σ = 139476410880. Its totient is φ = 66289176576.

The previous prime is 102011213119. The next prime is 102011213137. The reversal of 102011213121 is 121312110201.

It is not a de Polignac number, because 102011213121 - 2¹ = 102011213119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102011213121.

It is not an unprimeable number, because it can be changed into a prime (102011213191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50574705 + ... + 50576721.

It is an arithmetic number, because the mean of its divisors is an integer number (4358637840).

Almost surely, 2^102011213121 is an apocalyptic number.

It is an amenable number.

102011213121 is a deficient number, since it is larger than the sum of its proper divisors (37465197759).

102011213121 is a wasteful number, since it uses less digits than its factorization.

102011213121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3353.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 102011213121 its reverse (121312110201), we get a palindrome (223323323322).

The spelling of 102011213121 in words is "one hundred two billion, eleven million, two hundred thirteen thousand, one hundred twenty-one".