1201222113 has 24 divisors (see below), whose sum is σ = 2006440128. Its totient is φ = 633610656.

The previous prime is 1201222109. The next prime is 1201222117. The reversal of 1201222113 is 3112221021.

It is an interprime number because it is at equal distance from previous prime (1201222109) and next prime (1201222117).

It is not a de Polignac number, because 1201222113 - 2² = 1201222109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1201222092 and 1201222101.

It is not an unprimeable number, because it can be changed into a prime (1201222117) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 312381 + ... + 316202.

It is an arithmetic number, because the mean of its divisors is an integer number (83601672).

Almost surely, 2^1201222113 is an apocalyptic number.

1201222113 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1201222113 is a deficient number, since it is larger than the sum of its proper divisors (805218015).

1201222113 is a wasteful number, since it uses less digits than its factorization.

1201222113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628613 (or 628606 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1201222113 is about 34658.6513442171. The cubic root of 1201222113 is about 1063.0191936903.

Adding to 1201222113 its reverse (3112221021), we get a palindrome (4313443134).

The spelling of 1201222113 in words is "one billion, two hundred one million, two hundred twenty-two thousand, one hundred thirteen".