101212121000 has 64 divisors (see below), whose sum is σ = 247133652480. Its totient is φ = 38724628800.

The previous prime is 101212120991. The next prime is 101212121029. The reversal of 101212121000 is 121212101.

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 15 ways as a sum of consecutive naturals, for example, 2177264 + ... + 2223263.

It is an arithmetic number, because the mean of its divisors is an integer number (3861463320).

Almost surely, 2^101212121000 is an apocalyptic number.

101212121000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101212121000 is an abundant number, since it is smaller than the sum of its proper divisors (145921531480).

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

101212121000 is a wasteful number, since it uses less digits than its factorization.

101212121000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4400571 (or 4400557 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 101212121000 its reverse (121212101), we get a palindrome (101333333101).

The spelling of 101212121000 in words is "one hundred one billion, two hundred twelve million, one hundred twenty-one thousand".