101221210021212 has 18 divisors (see below), whose sum is σ = 255864725331488. Its totient is φ = 33740403340392.

The previous prime is 101221210021121. The next prime is 101221210021241. The reversal of 101221210021212 is 212120012122101.

101221210021212 is a `hidden beast` number, since 1 + 0 + 1 + 221 + 210 + 0 + 21 + 212 = 666.

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

It is a super-2 number, since 2×101221210021212² (a number of 29 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1405850139148 + ... + 1405850139219.

Almost surely, 2^{101221210021212} is an apocalyptic number.

101221210021212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

101221210021212 is an abundant number, since it is smaller than the sum of its proper divisors (154643515310276).

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

101221210021212 is a wasteful number, since it uses less digits than its factorization.

101221210021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2811700278377 (or 2811700278372 counting only the distinct ones).

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

Adding to 101221210021212 its reverse (212120012122101), we get a palindrome (313341222143313).

The spelling of 101221210021212 in words is "one hundred one trillion, two hundred twenty-one billion, two hundred ten million, twenty-one thousand, two hundred twelve".