4001100121 has 2 divisors, whose sum is σ = 4001100122. Its totient is φ = 4001100120.

The previous prime is 4001100073. The next prime is 4001100149. The reversal of 4001100121 is 1210011004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3017964096 + 983136025 = 54936^2 + 31355^2 .

It is a cyclic number.

It is not a de Polignac number, because 4001100121 - 2¹³ = 4001091929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4001100098 and 4001100107.

It is not a weakly prime, because it can be changed into another prime (4001100721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000550060 + 2000550061.

It is an arithmetic number, because the mean of its divisors is an integer number (2000550061).

Almost surely, 2^4001100121 is an apocalyptic number.

It is an amenable number.

4001100121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4001100121 is an equidigital number, since it uses as much as digits as its factorization.

4001100121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 4001100121 is about 63254.2498256046. The cubic root of 4001100121 is about 1587.5465663981.

Adding to 4001100121 its reverse (1210011004), we get a palindrome (5211111125).

The spelling of 4001100121 in words is "four billion, one million, one hundred thousand, one hundred twenty-one".