102021211212 has 12 divisors (see below), whose sum is σ = 238049492856. Its totient is φ = 34007070400.

The previous prime is 102021211199. The next prime is 102021211213. The reversal of 102021211212 is 212112120201.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 102021211191 and 102021211200.

It is not an unprimeable number, because it can be changed into a prime (102021211213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4250883789 + ... + 4250883812.

It is an arithmetic number, because the mean of its divisors is an integer number (19837457738).

Almost surely, 2^102021211212 is an apocalyptic number.

102021211212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

102021211212 is an abundant number, since it is smaller than the sum of its proper divisors (136028281644).

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

102021211212 is a wasteful number, since it uses less digits than its factorization.

102021211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8501767608 (or 8501767606 counting only the distinct ones).

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

Adding to 102021211212 its reverse (212112120201), we get a palindrome (314133331413).

The spelling of 102021211212 in words is "one hundred two billion, twenty-one million, two hundred eleven thousand, two hundred twelve".