4012056121 has 2 divisors, whose sum is σ = 4012056122. Its totient is φ = 4012056120.

The previous prime is 4012056119. The next prime is 4012056149. The reversal of 4012056121 is 1216502104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3530736400 + 481319721 = 59420^2 + 21939^2 .

It is a cyclic number.

It is not a de Polignac number, because 4012056121 - 2¹ = 4012056119 is a prime.

Together with 4012056119, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 4012056092 and 4012056101.

It is not a weakly prime, because it can be changed into another prime (4012056101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2006028060 + 2006028061.

It is an arithmetic number, because the mean of its divisors is an integer number (2006028061).

Almost surely, 2^4012056121 is an apocalyptic number.

It is an amenable number.

4012056121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4012056121 is an equidigital number, since it uses as much as digits as its factorization.

4012056121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 4012056121 is about 63340.7934983451. The cubic root of 4012056121 is about 1588.9942772921.

Adding to 4012056121 its reverse (1216502104), we get a palindrome (5228558225).

The spelling of 4012056121 in words is "four billion, twelve million, fifty-six thousand, one hundred twenty-one".