10001011212 has 36 divisors (see below), whose sum is σ = 25504064040. Its totient is φ = 3304167552.

The previous prime is 10001011177. The next prime is 10001011249. The reversal of 10001011212 is 21211010001.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

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 = 10001011194 and 10001011203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1225162 + ... + 1233297.

Almost surely, 2^10001011212 is an apocalyptic number.

10001011212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

10001011212 is an abundant number, since it is smaller than the sum of its proper divisors (15503052828).

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

10001011212 is a wasteful number, since it uses less digits than its factorization.

10001011212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2458582 (or 2458577 counting only the distinct ones).

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

Adding to 10001011212 its reverse (21211010001), we get a palindrome (31212021213).

The spelling of 10001011212 in words is "ten billion, one million, eleven thousand, two hundred twelve".