201121120021007 has 2 divisors, whose sum is σ = 201121120021008. Its totient is φ = 201121120021006.

The previous prime is 201121120021001. The next prime is 201121120021027. The reversal of 201121120021007 is 700120021121102.

It is a happy number.

It is an a-pointer prime, because the next prime (201121120021027) can be obtained adding 201121120021007 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201121120021007 is a prime.

It is a super-2 number, since 2×201121120021007² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 201121120021007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201121120021001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100560560010503 + 100560560010504.

It is an arithmetic number, because the mean of its divisors is an integer number (100560560010504).

Almost surely, 2^{201121120021007} is an apocalyptic number.

201121120021007 is a deficient number, since it is larger than the sum of its proper divisors (1).

201121120021007 is an equidigital number, since it uses as much as digits as its factorization.

201121120021007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 201121120021007 its reverse (700120021121102), we get a palindrome (901241141142109).

The spelling of 201121120021007 in words is "two hundred one trillion, one hundred twenty-one billion, one hundred twenty million, twenty-one thousand, seven".