10001221007 has 16 divisors (see below), whose sum is σ = 10611148800. Its totient is φ = 9399952800.

The previous prime is 10001221003. The next prime is 10001221019. The reversal of 10001221007 is 70012210001.

It is a cyclic number.

It is not a de Polignac number, because 10001221007 - 2² = 10001221003 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10001220982 and 10001221000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001221001) 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, 1253882 + ... + 1261832.

It is an arithmetic number, because the mean of its divisors is an integer number (663196800).

Almost surely, 2^10001221007 is an apocalyptic number.

10001221007 is a deficient number, since it is larger than the sum of its proper divisors (609927793).

10001221007 is a wasteful number, since it uses less digits than its factorization.

10001221007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8486.

The product of its (nonzero) digits is 28, while the sum is 14.

Adding to 10001221007 its reverse (70012210001), we get a palindrome (80013431008).

The spelling of 10001221007 in words is "ten billion, one million, two hundred twenty-one thousand, seven".