10001001212010 has 96 divisors (see below), whose sum is σ = 26567487378432. Its totient is φ = 2609046547200.

The previous prime is 10001001211987. The next prime is 10001001212047. The reversal of 10001001212010 is 1021210010001.

It is a happy number.

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 = 10001001211983 and 10001001212001.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9157110 + ... + 10190910.

It is an arithmetic number, because the mean of its divisors is an integer number (276744660192).

Almost surely, 2^{10001001212010} is an apocalyptic number.

10001001212010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 10001001212010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13283743689216).

10001001212010 is an abundant number, since it is smaller than the sum of its proper divisors (16566486166422).

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

10001001212010 is a wasteful number, since it uses less digits than its factorization.

10001001212010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036148 (or 1036145 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 10001001212010 its reverse (1021210010001), we get a palindrome (11022211222011).

The spelling of 10001001212010 in words is "ten trillion, one billion, one million, two hundred twelve thousand, ten".