102121201121212 has 96 divisors (see below), whose sum is σ = 220776750714240. Its totient is φ = 40248510059520.

The previous prime is 102121201121179. The next prime is 102121201121221. The reversal of 102121201121212 is 212121102121201.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 102121201121212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 196939162 + ... + 197457022.

It is an arithmetic number, because the mean of its divisors is an integer number (2299757819940).

Almost surely, 2^{102121201121212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102121201121212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110388375357120).

102121201121212 is an abundant number, since it is smaller than the sum of its proper divisors (118655549593028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102121201121212 is a wasteful number, since it uses less digits than its factorization.

102121201121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519911 (or 519909 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 102121201121212 its reverse (212121102121201), we get a palindrome (314242303242413).

The spelling of 102121201121212 in words is "one hundred two trillion, one hundred twenty-one billion, two hundred one million, one hundred twenty-one thousand, two hundred twelve".