10101212121000 has 1024 divisors, whose sum is σ = 43459019735040. Its totient is φ = 1885109760000.

The previous prime is 10101212120929. The next prime is 10101212121017. The reversal of 10101212121000 is 12121210101.

It is a Harshad number since it is a multiple of its sum of digits (12).

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 255 ways as a sum of consecutive naturals, for example, 111065545 + ... + 111156455.

It is an arithmetic number, because the mean of its divisors is an integer number (42440448960).

Almost surely, 2^{10101212121000} is an apocalyptic number.

10101212121000 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 10101212121000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21729509867520).

10101212121000 is an abundant number, since it is smaller than the sum of its proper divisors (33357807614040).

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

10101212121000 is a wasteful number, since it uses less digits than its factorization.

10101212121000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91003 (or 90989 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 10101212121000 its reverse (12121210101), we get a palindrome (10113333331101).

The spelling of 10101212121000 in words is "ten trillion, one hundred one billion, two hundred twelve million, one hundred twenty-one thousand".