121221010007 has 2 divisors, whose sum is σ = 121221010008. Its totient is φ = 121221010006.

The previous prime is 121221009967. The next prime is 121221010039. The reversal of 121221010007 is 700010122121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121221010007 - 2¹⁰ = 121221008983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121221010087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610505003 + 60610505004.

It is an arithmetic number, because the mean of its divisors is an integer number (60610505004).

Almost surely, 2^121221010007 is an apocalyptic number.

121221010007 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221010007 is an equidigital number, since it uses as much as digits as its factorization.

121221010007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 17.

Adding to 121221010007 its reverse (700010122121), we get a palindrome (821231132128).

The spelling of 121221010007 in words is "one hundred twenty-one billion, two hundred twenty-one million, ten thousand, seven".