1201043220 has 48 divisors (see below), whose sum is σ = 3621609600. Its totient is φ = 295641216.

The previous prime is 1201043177. The next prime is 1201043297. The reversal of 1201043220 is 223401021.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1201043220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 769120 + ... + 770679.

It is an arithmetic number, because the mean of its divisors is an integer number (75450200).

Almost surely, 2^1201043220 is an apocalyptic number.

1201043220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201043220 is an abundant number, since it is smaller than the sum of its proper divisors (2420566380).

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

1201043220 is a wasteful number, since it uses less digits than its factorization.

1201043220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539824 (or 1539822 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1201043220 is about 34656.0704639173. The cubic root of 1201043220 is about 1062.9664207320.

Adding to 1201043220 its reverse (223401021), we get a palindrome (1424444241).

The spelling of 1201043220 in words is "one billion, two hundred one million, forty-three thousand, two hundred twenty".