1221314523 has 64 divisors (see below), whose sum is σ = 1964196864. Its totient is φ = 665280000.

The previous prime is 1221314503. The next prime is 1221314531. The reversal of 1221314523 is 3254131221.

It is not a de Polignac number, because 1221314523 - 2⁸ = 1221314267 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1221314493 and 1221314502.

It is not an unprimeable number, because it can be changed into a prime (1221314503) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3076161 + ... + 3076557.

It is an arithmetic number, because the mean of its divisors is an integer number (30690576).

Almost surely, 2^1221314523 is an apocalyptic number.

1221314523 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1221314523 is a deficient number, since it is larger than the sum of its proper divisors (742882341).

1221314523 is a wasteful number, since it uses less digits than its factorization.

1221314523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596.

The product of its digits is 1440, while the sum is 24.

The square root of 1221314523 is about 34947.3106690629. The cubic root of 1221314523 is about 1068.9133647747.

Adding to 1221314523 its reverse (3254131221), we get a palindrome (4475445744).

The spelling of 1221314523 in words is "one billion, two hundred twenty-one million, three hundred fourteen thousand, five hundred twenty-three".