1200221148 has 48 divisors (see below), whose sum is σ = 3388863744. Its totient is φ = 322748160.

The previous prime is 1200221147. The next prime is 1200221287. The reversal of 1200221148 is 8411220021.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200221147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 418818 + ... + 421673.

It is an arithmetic number, because the mean of its divisors is an integer number (70601328).

Almost surely, 2^1200221148 is an apocalyptic number.

It is an amenable number.

1200221148 is an abundant number, since it is smaller than the sum of its proper divisors (2188642596).

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

1200221148 is a wasteful number, since it uses less digits than its factorization.

1200221148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840522 (or 840520 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 1200221148 is about 34644.2080007611. The cubic root of 1200221148 is about 1062.7238442888.

Adding to 1200221148 its reverse (8411220021), we get a palindrome (9611441169).

The spelling of 1200221148 in words is "one billion, two hundred million, two hundred twenty-one thousand, one hundred forty-eight".