1220021011134 has 12 divisors (see below), whose sum is σ = 2643378857496. Its totient is φ = 406673670372.

The previous prime is 1220021011103. The next prime is 1220021011163. The reversal of 1220021011134 is 4311101200221.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 67778945063 = 1220021011134 / (1 + 2 + 2 + 0 + 0 + 2 + 1 + 0 + 1 + 1 + 1 + 3 + 4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33889472514 + ... + 33889472549.

It is an arithmetic number, because the mean of its divisors is an integer number (220281571458).

Almost surely, 2^{1220021011134} is an apocalyptic number.

1220021011134 is an abundant number, since it is smaller than the sum of its proper divisors (1423357846362).

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

1220021011134 is a wasteful number, since it uses less digits than its factorization.

1220021011134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67778945071 (or 67778945068 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1220021011134 its reverse (4311101200221), we get a palindrome (5531122211355).

The spelling of 1220021011134 in words is "one trillion, two hundred twenty billion, twenty-one million, eleven thousand, one hundred thirty-four".