1201221300 has 72 divisors (see below), whose sum is σ = 3549522816. Its totient is φ = 313506560.

The previous prime is 1201221293. The next prime is 1201221313. The reversal of 1201221300 is 31221021.

It is a super-2 number, since 2×1201221300² = 2885865223147380000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28497 + ... + 56696.

It is an arithmetic number, because the mean of its divisors is an integer number (49298928).

Almost surely, 2^1201221300 is an apocalyptic number.

1201221300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201221300 is an abundant number, since it is smaller than the sum of its proper divisors (2348301516).

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

1201221300 is a wasteful number, since it uses less digits than its factorization.

1201221300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85257 (or 85250 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1201221300 is about 34658.6396155418. The cubic root of 1201221300 is about 1063.0189538693.

Adding to 1201221300 its reverse (31221021), we get a palindrome (1232442321).

The spelling of 1201221300 in words is "one billion, two hundred one million, two hundred twenty-one thousand, three hundred".