10001221010 has 64 divisors (see below), whose sum is σ = 20340460800. Its totient is φ = 3507168000.

The previous prime is 10001221003. The next prime is 10001221019. The reversal of 10001221010 is 1012210001.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10001221019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3919235 + ... + 3921785.

It is an arithmetic number, because the mean of its divisors is an integer number (317819700).

Almost surely, 2^10001221010 is an apocalyptic number.

10001221010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10001221010 is an abundant number, since it is smaller than the sum of its proper divisors (10339239790).

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

10001221010 is a wasteful number, since it uses less digits than its factorization.

10001221010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3827.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 10001221010 its reverse (1012210001), we get a palindrome (11013431011).

The spelling of 10001221010 in words is "ten billion, one million, two hundred twenty-one thousand, ten".