100001212011 has 8 divisors (see below), whose sum is σ = 148149943760. Its totient is φ = 66667474656.

The previous prime is 100001211979. The next prime is 100001212039. The reversal of 100001212011 is 110212100001.

It is a happy number.

It is not a de Polignac number, because 100001212011 - 2⁵ = 100001211979 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100001211984 and 100001212002.

It is not an unprimeable number, because it can be changed into a prime (100001210011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1851874270 + ... + 1851874323.

It is an arithmetic number, because the mean of its divisors is an integer number (18518742970).

Almost surely, 2^100001212011 is an apocalyptic number.

100001212011 is a deficient number, since it is larger than the sum of its proper divisors (48148731749).

100001212011 is an equidigital number, since it uses as much as digits as its factorization.

100001212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3703748602 (or 3703748596 counting only the distinct ones).

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

Adding to 100001212011 its reverse (110212100001), we get a palindrome (210213312012).

The spelling of 100001212011 in words is "one hundred billion, one million, two hundred twelve thousand, eleven".