4021212623789 has 2 divisors, whose sum is σ = 4021212623790. Its totient is φ = 4021212623788.

The previous prime is 4021212623717. The next prime is 4021212623797. The reversal of 4021212623789 is 9873262121204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2842316130889 + 1178896492900 = 1685917^2 + 1085770^2 .

It is a cyclic number.

It is not a de Polignac number, because 4021212623789 - 2²⁴ = 4021195846573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4021212625789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010606311894 + 2010606311895.

It is an arithmetic number, because the mean of its divisors is an integer number (2010606311895).

Almost surely, 2^{4021212623789} is an apocalyptic number.

It is an amenable number.

4021212623789 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021212623789 is an equidigital number, since it uses as much as digits as its factorization.

4021212623789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 580608, while the sum is 47.

The spelling of 4021212623789 in words is "four trillion, twenty-one billion, two hundred twelve million, six hundred twenty-three thousand, seven hundred eighty-nine".