1009910100921 has 16 divisors (see below), whose sum is σ = 1423885843968. Its totient is φ = 635663318400.

The previous prime is 1009910100889. The next prime is 1009910100923. The reversal of 1009910100921 is 1290010199001.

It is not a de Polignac number, because 1009910100921 - 2⁵ = 1009910100889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1009910100923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132426046 + ... + 132433671.

It is an arithmetic number, because the mean of its divisors is an integer number (88992865248).

Almost surely, 2^{1009910100921} is an apocalyptic number.

It is an amenable number.

1009910100921 is a deficient number, since it is larger than the sum of its proper divisors (413975743047).

1009910100921 is a wasteful number, since it uses less digits than its factorization.

1009910100921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264859792.

The product of its (nonzero) digits is 1458, while the sum is 33.

Adding to 1009910100921 its reverse (1290010199001), we get a palindrome (2299920299922).

The spelling of 1009910100921 in words is "one trillion, nine billion, nine hundred ten million, one hundred thousand, nine hundred twenty-one".