1220133405 has 32 divisors (see below), whose sum is σ = 1992864384. Its totient is φ = 637235456.

The previous prime is 1220133379. The next prime is 1220133451. The reversal of 1220133405 is 5043310221.

It is a cyclic number.

It is not a de Polignac number, because 1220133405 - 2¹¹ = 1220131357 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 537082 + ... + 539348.

It is an arithmetic number, because the mean of its divisors is an integer number (62277012).

Almost surely, 2^1220133405 is an apocalyptic number.

1220133405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1220133405 is a deficient number, since it is larger than the sum of its proper divisors (772730979).

1220133405 is a wasteful number, since it uses less digits than its factorization.

1220133405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3005.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1220133405 is about 34930.4080279633. The cubic root of 1220133405 is about 1068.5686760541.

Adding to 1220133405 its reverse (5043310221), we get a palindrome (6263443626).

The spelling of 1220133405 in words is "one billion, two hundred twenty million, one hundred thirty-three thousand, four hundred five".