1011881210021 has 8 divisors (see below), whose sum is σ = 1104278227104. Its totient is φ = 919552162320.

The previous prime is 1011881210003. The next prime is 1011881210027. The reversal of 1011881210021 is 1200121881101.

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

It is not a de Polignac number, because 1011881210021 - 2¹⁰ = 1011881208997 is a prime.

It is a super-2 number, since 2×1011881210021² (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 (1011881210027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16961210 + ... + 17020763.

It is an arithmetic number, because the mean of its divisors is an integer number (138034778388).

Almost surely, 2^{1011881210021} is an apocalyptic number.

1011881210021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1011881210021 is a deficient number, since it is larger than the sum of its proper divisors (92397017083).

1011881210021 is a wasteful number, since it uses less digits than its factorization.

1011881210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33984691.

The product of its (nonzero) digits is 256, while the sum is 26.

The spelling of 1011881210021 in words is "one trillion, eleven billion, eight hundred eighty-one million, two hundred ten thousand, twenty-one".