101221212012 has 24 divisors (see below), whose sum is σ = 236187973056. Its totient is φ = 33739669008.

The previous prime is 101221211909. The next prime is 101221212019. The reversal of 101221212012 is 210212122101.

It is a super-2 number, since 2×101221212012² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 101221211982 and 101221212000.

It is not an unprimeable number, because it can be changed into a prime (101221212019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1026163 + ... + 1120469.

It is an arithmetic number, because the mean of its divisors is an integer number (9841165544).

Almost surely, 2^101221212012 is an apocalyptic number.

101221212012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

101221212012 is an abundant number, since it is smaller than the sum of its proper divisors (134966761044).

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

101221212012 is a wasteful number, since it uses less digits than its factorization.

101221212012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183757 (or 183755 counting only the distinct ones).

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

Adding to 101221212012 its reverse (210212122101), we get a palindrome (311433334113).

The spelling of 101221212012 in words is "one hundred one billion, two hundred twenty-one million, two hundred twelve thousand, twelve".