102121211200212 has 18 divisors (see below), whose sum is σ = 258139728311738. Its totient is φ = 34040403733392.

The previous prime is 102121211200207. The next prime is 102121211200213. The reversal of 102121211200212 is 212002112121201.

102121211200212 is a `hidden beast` number, since 1 + 0 + 21 + 21 + 211 + 200 + 212 = 666.

It can be written as a sum of positive squares in only one way, i.e., 99485543371536 + 2635667828676 = 9974244^2 + 1623474^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102121211200213) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1418350155523 + ... + 1418350155594.

Almost surely, 2^{102121211200212} is an apocalyptic number.

102121211200212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

102121211200212 is an abundant number, since it is smaller than the sum of its proper divisors (156018517111526).

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

102121211200212 is a wasteful number, since it uses less digits than its factorization.

102121211200212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2836700311127 (or 2836700311122 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 102121211200212 its reverse (212002112121201), we get a palindrome (314123323321413).

The spelling of 102121211200212 in words is "one hundred two trillion, one hundred twenty-one billion, two hundred eleven million, two hundred thousand, two hundred twelve".