101221012212 has 24 divisors (see below), whose sum is σ = 236329195200. Its totient is φ = 33719361216.

The previous prime is 101221012201. The next prime is 101221012241. The reversal of 101221012212 is 212210122101.

It is a junction number, because it is equal to n+sod(n) for n = 101221012191 and 101221012200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2601912 + ... + 2640527.

It is an arithmetic number, because the mean of its divisors is an integer number (9847049800).

Almost surely, 2^101221012212 is an apocalyptic number.

101221012212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

101221012212 is an abundant number, since it is smaller than the sum of its proper divisors (135108182988).

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

101221012212 is a wasteful number, since it uses less digits than its factorization.

101221012212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5244055 (or 5244053 counting only the distinct ones).

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

Adding to 101221012212 its reverse (212210122101), we get a palindrome (313431134313).

The spelling of 101221012212 in words is "one hundred one billion, two hundred twenty-one million, twelve thousand, two hundred twelve".