102101221212 has 12 divisors (see below), whose sum is σ = 238236182856. Its totient is φ = 34033740400.

The previous prime is 102101221193. The next prime is 102101221219. The reversal of 102101221212 is 212122101201.

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 = 102101221191 and 102101221200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102101221219) 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, 4254217539 + ... + 4254217562.

It is an arithmetic number, because the mean of its divisors is an integer number (19853015238).

Almost surely, 2^102101221212 is an apocalyptic number.

102101221212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

102101221212 is an abundant number, since it is smaller than the sum of its proper divisors (136134961644).

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

102101221212 is a wasteful number, since it uses less digits than its factorization.

102101221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8508435108 (or 8508435106 counting only the distinct ones).

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

Adding to 102101221212 its reverse (212122101201), we get a palindrome (314223322413).

The spelling of 102101221212 in words is "one hundred two billion, one hundred one million, two hundred twenty-one thousand, two hundred twelve".