10001221112 has 16 divisors (see below), whose sum is σ = 18757332000. Its totient is φ = 4999265920.

The previous prime is 10001221103. The next prime is 10001221127. The reversal of 10001221112 is 21112210001.

It is a super-2 number, since 2×10001221112² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10001221093 and 10001221102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136112 + ... + 196287.

It is an arithmetic number, because the mean of its divisors is an integer number (1172333250).

Almost surely, 2^10001221112 is an apocalyptic number.

It is an amenable number.

10001221112 is a deficient number, since it is larger than the sum of its proper divisors (8756110888).

10001221112 is a wasteful number, since it uses less digits than its factorization.

10001221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336166 (or 336162 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 10001221112 its reverse (21112210001), we get a palindrome (31113431113).

The spelling of 10001221112 in words is "ten billion, one million, two hundred twenty-one thousand, one hundred twelve".