100001221012 has 36 divisors (see below), whose sum is σ = 219837402400. Its totient is φ = 38961513360.

The previous prime is 100001220973. The next prime is 100001221037. The reversal of 100001221012 is 210122100001.

It is a self number, because there is not a number n which added to its sum of digits gives 100001221012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14754762 + ... + 14761537.

Almost surely, 2^100001221012 is an apocalyptic number.

It is an amenable number.

100001221012 is an abundant number, since it is smaller than the sum of its proper divisors (119836181388).

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

100001221012 is a wasteful number, since it uses less digits than its factorization.

100001221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29516332 (or 29516319 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 100001221012 its reverse (210122100001), we get a palindrome (310123321013).

The spelling of 100001221012 in words is "one hundred billion, one million, two hundred twenty-one thousand, twelve".