1110021211981 has 8 divisors (see below), whose sum is σ = 1219771154304. Its totient is φ = 1001744423520.

The previous prime is 1110021211921. The next prime is 1110021211991. The reversal of 1110021211981 is 1891121200111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1110021211981 - 2¹⁹ = 1110020687693 is a prime.

It is a super-2 number, since 2×1110021211981² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1110021211921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 368286885 + ... + 368289898.

It is an arithmetic number, because the mean of its divisors is an integer number (152471394288).

Almost surely, 2^{1110021211981} is an apocalyptic number.

1110021211981 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1110021211981 is a deficient number, since it is larger than the sum of its proper divisors (109749942323).

1110021211981 is a wasteful number, since it uses less digits than its factorization.

1110021211981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736576931.

The product of its (nonzero) digits is 288, while the sum is 28.

The spelling of 1110021211981 in words is "one trillion, one hundred ten billion, twenty-one million, two hundred eleven thousand, nine hundred eighty-one".