4012010402021 has 2 divisors, whose sum is σ = 4012010402022. Its totient is φ = 4012010402020.

The previous prime is 4012010401999. The next prime is 4012010402089. The reversal of 4012010402021 is 1202040102104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2571436744900 + 1440573657121 = 1603570^2 + 1200239^2 .

It is a cyclic number.

It is not a de Polignac number, because 4012010402021 - 2¹⁸ = 4012010139877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4012010402221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2006005201010 + 2006005201011.

It is an arithmetic number, because the mean of its divisors is an integer number (2006005201011).

Almost surely, 2^{4012010402021} is an apocalyptic number.

It is an amenable number.

4012010402021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4012010402021 is an equidigital number, since it uses as much as digits as its factorization.

4012010402021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 4012010402021 its reverse (1202040102104), we get a palindrome (5214050504125).

The spelling of 4012010402021 in words is "four trillion, twelve billion, ten million, four hundred two thousand, twenty-one".