101212000020 has 288 divisors, whose sum is σ = 348379170048. Its totient is φ = 23640477696.

The previous prime is 101212000013. The next prime is 101212000061. The reversal of 101212000020 is 20000212101.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 101211999966 and 101212000011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2584627 + ... + 2623493.

It is an arithmetic number, because the mean of its divisors is an integer number (1209649896).

Almost surely, 2^101212000020 is an apocalyptic number.

101212000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 101212000020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174189585024).

101212000020 is an abundant number, since it is smaller than the sum of its proper divisors (247167170028).

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

101212000020 is a wasteful number, since it uses less digits than its factorization.

101212000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38959 (or 38954 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 101212000020 its reverse (20000212101), we get a palindrome (121212212121).

The spelling of 101212000020 in words is "one hundred one billion, two hundred twelve million, twenty", and thus it is an aban number.