1200221021142 has 48 divisors (see below), whose sum is σ = 3055108060368. Its totient is φ = 335726159040.

The previous prime is 1200221021141. The next prime is 1200221021159. The reversal of 1200221021142 is 2411201220021.

1200221021142 is a `hidden beast` number, since 1 + 200 + 2 + 210 + 211 + 42 = 666.

It is a super-2 number, since 2×1200221021142² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200221021141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 233140593 + ... + 233145740.

It is an arithmetic number, because the mean of its divisors is an integer number (63648084591).

Almost surely, 2^{1200221021142} is an apocalyptic number.

1200221021142 is an abundant number, since it is smaller than the sum of its proper divisors (1854887039226).

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

1200221021142 is a wasteful number, since it uses less digits than its factorization.

1200221021142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466286365 (or 466286362 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1200221021142 its reverse (2411201220021), we get a palindrome (3611422241163).

The spelling of 1200221021142 in words is "one trillion, two hundred billion, two hundred twenty-one million, twenty-one thousand, one hundred forty-two".