1222712421 has 16 divisors (see below), whose sum is σ = 1865178624. Its totient is φ = 697943664.

The previous prime is 1222712419. The next prime is 1222712423. The reversal of 1222712421 is 1242172221.

It is an interprime number because it is at equal distance from previous prime (1222712419) and next prime (1222712423).

It is not a de Polignac number, because 1222712421 - 2¹ = 1222712419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1222712391 and 1222712400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222712423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10855 + ... + 50628.

It is an arithmetic number, because the mean of its divisors is an integer number (116573664).

Almost surely, 2^1222712421 is an apocalyptic number.

It is an amenable number.

1222712421 is a deficient number, since it is larger than the sum of its proper divisors (642466203).

1222712421 is an equidigital number, since it uses as much as digits as its factorization.

1222712421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62440.

The product of its digits is 896, while the sum is 24.

The square root of 1222712421 is about 34967.3050291269. The cubic root of 1222712421 is about 1069.3210299304.

Adding to 1222712421 its reverse (1242172221), we get a palindrome (2464884642).

The spelling of 1222712421 in words is "one billion, two hundred twenty-two million, seven hundred twelve thousand, four hundred twenty-one".