1221054933 has 16 divisors (see below), whose sum is σ = 1871415936. Its totient is φ = 693710400.

The previous prime is 1221054917. The next prime is 1221054941. The reversal of 1221054933 is 3394501221.

It is not a de Polignac number, because 1221054933 - 2⁴ = 1221054917 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1221054933.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221054433) 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, 164418 + ... + 171683.

It is an arithmetic number, because the mean of its divisors is an integer number (116963496).

Almost surely, 2^1221054933 is an apocalyptic number.

It is an amenable number.

1221054933 is a deficient number, since it is larger than the sum of its proper divisors (650361003).

1221054933 is a wasteful number, since it uses less digits than its factorization.

1221054933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336284.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 1221054933 is about 34943.5964519968. The cubic root of 1221054933 is about 1068.8376270138.

The spelling of 1221054933 in words is "one billion, two hundred twenty-one million, fifty-four thousand, nine hundred thirty-three".