1301221100 has 36 divisors (see below), whose sum is σ = 2892528408. Its totient is φ = 507792000.

The previous prime is 1301221093. The next prime is 1301221109. The reversal of 1301221100 is 11221031.

It is not an unprimeable number, because it can be changed into a prime (1301221109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 154586 + ... + 162785.

Almost surely, 2^1301221100 is an apocalyptic number.

1301221100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1301221100 is an abundant number, since it is smaller than the sum of its proper divisors (1591307308).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1301221100 is a wasteful number, since it uses less digits than its factorization.

1301221100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317426 (or 317419 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1301221100 is about 36072.4423902790. The cubic root of 1301221100 is about 1091.7344940343.

Adding to 1301221100 its reverse (11221031), we get a palindrome (1312442131).

The spelling of 1301221100 in words is "one billion, three hundred one million, two hundred twenty-one thousand, one hundred".