1220421022423 has 2 divisors, whose sum is σ = 1220421022424. Its totient is φ = 1220421022422.

The previous prime is 1220421022397. The next prime is 1220421022463. The reversal of 1220421022423 is 3242201240221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1220421022423 - 2²⁹ = 1219884151511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220421022463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610210511211 + 610210511212.

It is an arithmetic number, because the mean of its divisors is an integer number (610210511212).

Almost surely, 2^{1220421022423} is an apocalyptic number.

1220421022423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220421022423 is an equidigital number, since it uses as much as digits as its factorization.

1220421022423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 1220421022423 its reverse (3242201240221), we get a palindrome (4462622262644).

The spelling of 1220421022423 in words is "one trillion, two hundred twenty billion, four hundred twenty-one million, twenty-two thousand, four hundred twenty-three".