3720412121 has 2 divisors, whose sum is σ = 3720412122. Its totient is φ = 3720412120.

The previous prime is 3720412093. The next prime is 3720412133. The reversal of 3720412121 is 1212140273.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3585015625 + 135396496 = 59875^2 + 11636^2 .

It is a cyclic number.

It is not a de Polignac number, because 3720412121 - 2⁶ = 3720412057 is a prime.

It is not a weakly prime, because it can be changed into another prime (3720412151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1860206060 + 1860206061.

It is an arithmetic number, because the mean of its divisors is an integer number (1860206061).

Almost surely, 2^3720412121 is an apocalyptic number.

It is an amenable number.

3720412121 is a deficient number, since it is larger than the sum of its proper divisors (1).

3720412121 is an equidigital number, since it uses as much as digits as its factorization.

3720412121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 3720412121 is about 60995.1811293318. The cubic root of 3720412121 is about 1549.5193960532.

Adding to 3720412121 its reverse (1212140273), we get a palindrome (4932552394).

The spelling of 3720412121 in words is "three billion, seven hundred twenty million, four hundred twelve thousand, one hundred twenty-one".