1201222000 has 80 divisors (see below), whose sum is σ = 3168663264. Its totient is φ = 436800000.

The previous prime is 1201221961. The next prime is 1201222027. The reversal of 1201222000 is 2221021.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (10).

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, 5301 + ... + 49300.

Almost surely, 2^1201222000 is an apocalyptic number.

1201222000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1201222000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1584331632).

1201222000 is an abundant number, since it is smaller than the sum of its proper divisors (1967441264).

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

1201222000 is a wasteful number, since it uses less digits than its factorization.

1201222000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54635 (or 54619 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1201222000 is about 34658.6497140324. The cubic root of 1201222000 is about 1063.0191603573.

Adding to 1201222000 its reverse (2221021), we get a palindrome (1203443021).

The spelling of 1201222000 in words is "one billion, two hundred one million, two hundred twenty-two thousand".