102011212121 has 8 divisors (see below), whose sum is σ = 125552261184. Its totient is φ = 80712167760.

The previous prime is 102011212081. The next prime is 102011212201. The reversal of 102011212121 is 121212110201.

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

It is a de Polignac number, because none of the positive numbers 2^k-102011212121 is a prime.

102011212121 is a modest number, since divided by 212121 gives 102011 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 102011212096 and 102011212105.

It is not an unprimeable number, because it can be changed into a prime (102011212321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 560501075 + ... + 560501256.

It is an arithmetic number, because the mean of its divisors is an integer number (15694032648).

Almost surely, 2^102011212121 is an apocalyptic number.

It is an amenable number.

102011212121 is a deficient number, since it is larger than the sum of its proper divisors (23541049063).

102011212121 is a wasteful number, since it uses less digits than its factorization.

102011212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121002351.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 102011212121 its reverse (121212110201), we get a palindrome (223223322322).

It can be divided in two parts, 10201 and 1212121, that multiplied together give a palindrome (12364846321).

The spelling of 102011212121 in words is "one hundred two billion, eleven million, two hundred twelve thousand, one hundred twenty-one".