1221453933 has 16 divisors (see below), whose sum is σ = 1863805440. Its totient is φ = 697020336.

The previous prime is 1221453913. The next prime is 1221453943. The reversal of 1221453933 is 3393541221.

1221453933 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1221453933 - 2⁸ = 1221453677 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1221453894 and 1221453903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221453913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23835 + ... + 54872.

It is an arithmetic number, because the mean of its divisors is an integer number (116487840).

Almost surely, 2^1221453933 is an apocalyptic number.

It is an amenable number.

1221453933 is a deficient number, since it is larger than the sum of its proper divisors (642351507).

1221453933 is an equidigital number, since it uses as much as digits as its factorization.

1221453933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79456.

The product of its digits is 19440, while the sum is 33.

The square root of 1221453933 is about 34949.3051862265. The cubic root of 1221453933 is about 1068.9540344902.

The spelling of 1221453933 in words is "one billion, two hundred twenty-one million, four hundred fifty-three thousand, nine hundred thirty-three".