102102212121 has 16 divisors (see below), whose sum is σ = 167552348544. Its totient is φ = 53856111744.

The previous prime is 102102212119. The next prime is 102102212123. The reversal of 102102212121 is 121212201201.

It is an interprime number because it is at equal distance from previous prime (102102212119) and next prime (102102212123).

It is not a de Polignac number, because 102102212121 - 2¹ = 102102212119 is a prime.

102102212121 is a modest number, since divided by 212121 gives 102102 as remainder.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 102102212121.

It is not an unprimeable number, because it can be changed into a prime (102102212123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187000116 + ... + 187000661.

It is an arithmetic number, because the mean of its divisors is an integer number (10472021784).

Almost surely, 2^102102212121 is an apocalyptic number.

It is an amenable number.

102102212121 is a deficient number, since it is larger than the sum of its proper divisors (65450136423).

102102212121 is a wasteful number, since it uses less digits than its factorization.

102102212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374000800.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 102102212121 its reverse (121212201201), we get a palindrome (223314413322).

The spelling of 102102212121 in words is "one hundred two billion, one hundred two million, two hundred twelve thousand, one hundred twenty-one".