1201233121 has 8 divisors (see below), whose sum is σ = 1367411904. Its totient is φ = 1044550320.

The previous prime is 1201233113. The next prime is 1201233139. The reversal of 1201233121 is 1213321021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1201233121 - 2³ = 1201233113 is a prime.

It is a super-2 number, since 2×1201233121² = 2885922021974801282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201233095 and 1201233104.

It is not an unprimeable number, because it can be changed into a prime (1201233101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2373726 + ... + 2374231.

It is an arithmetic number, because the mean of its divisors is an integer number (170926488).

Almost surely, 2^1201233121 is an apocalyptic number.

1201233121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1201233121 is a deficient number, since it is larger than the sum of its proper divisors (166178783).

1201233121 is a wasteful number, since it uses less digits than its factorization.

1201233121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4747991.

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

The square root of 1201233121 is about 34658.8101498017. The cubic root of 1201233121 is about 1063.0224408499.

Adding to 1201233121 its reverse (1213321021), we get a palindrome (2414554142).

The spelling of 1201233121 in words is "one billion, two hundred one million, two hundred thirty-three thousand, one hundred twenty-one".