100021001210001 has 48 divisors (see below), whose sum is σ = 157648661726400. Its totient is φ = 60889401316224.

The previous prime is 100021001209999. The next prime is 100021001210051. The reversal of 100021001210001 is 100012100120001.

It is a happy number.

It is not a de Polignac number, because 100021001210001 - 2¹ = 100021001209999 is a prime.

It is a super-2 number, since 2×100021001210001² (a number of 29 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (100021001210051) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 73194966 + ... + 74548943.

It is an arithmetic number, because the mean of its divisors is an integer number (3284347119300).

Almost surely, 2^{100021001210001} is an apocalyptic number.

It is an amenable number.

100021001210001 is a deficient number, since it is larger than the sum of its proper divisors (57627660516399).

100021001210001 is a wasteful number, since it uses less digits than its factorization.

100021001210001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147744078 (or 147744075 counting only the distinct ones).

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

Adding to 100021001210001 its reverse (100012100120001), we get a palindrome (200033101330002).

The spelling of 100021001210001 in words is "one hundred trillion, twenty-one billion, one million, two hundred ten thousand, one".