1224021031 has 4 divisors (see below), whose sum is σ = 1226699872. Its totient is φ = 1221342192.

The previous prime is 1224020977. The next prime is 1224021037. The reversal of 1224021031 is 1301204221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1301204221 = 761 ⋅1709861.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1224021031 is a prime.

It is a super-2 number, since 2×1224021031² = 2996454968660605922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1224020996 and 1224021014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224021037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1338735 + ... + 1339648.

It is an arithmetic number, because the mean of its divisors is an integer number (306674968).

Almost surely, 2^1224021031 is an apocalyptic number.

1224021031 is a deficient number, since it is larger than the sum of its proper divisors (2678841).

1224021031 is an equidigital number, since it uses as much as digits as its factorization.

1224021031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2678840.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1224021031 is about 34986.0119333427. The cubic root of 1224021031 is about 1069.7023747873.

Adding to 1224021031 its reverse (1301204221), we get a palindrome (2525225252).

The spelling of 1224021031 in words is "one billion, two hundred twenty-four million, twenty-one thousand, thirty-one".