1201213321 has 32 divisors (see below), whose sum is σ = 1570694400. Its totient is φ = 891233280.

The previous prime is 1201213309. The next prime is 1201213337. The reversal of 1201213321 is 1233121021.

It is not a de Polignac number, because 1201213321 - 2⁵ = 1201213289 is a prime.

It is a super-3 number, since 3×1201213321³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1201213295 and 1201213304.

It is not an unprimeable number, because it can be changed into a prime (1201213381) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 159325 + ... + 166693.

It is an arithmetic number, because the mean of its divisors is an integer number (49084200).

Almost surely, 2^1201213321 is an apocalyptic number.

1201213321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1201213321 is a deficient number, since it is larger than the sum of its proper divisors (369481079).

1201213321 is a wasteful number, since it uses less digits than its factorization.

1201213321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7489.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1201213321 is about 34658.5245069665. The cubic root of 1201213321 is about 1063.0166001962.

Adding to 1201213321 its reverse (1233121021), we get a palindrome (2434334342).

The spelling of 1201213321 in words is "one billion, two hundred one million, two hundred thirteen thousand, three hundred twenty-one".