1011011221021 has 8 divisors (see below), whose sum is σ = 1043166660480. Its totient is φ = 979299305088.

The previous prime is 1011011220997. The next prime is 1011011221057. The reversal of 1011011221021 is 1201221101101.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011011221021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011011220992 and 1011011221010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011011221921) 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, 110876251 + ... + 110885368.

It is an arithmetic number, because the mean of its divisors is an integer number (130395832560).

Almost surely, 2^{1011011221021} is an apocalyptic number.

It is an amenable number.

1011011221021 is a deficient number, since it is larger than the sum of its proper divisors (32155439459).

1011011221021 is an equidigital number, since it uses as much as digits as its factorization.

1011011221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221761763.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1011011221021 its reverse (1201221101101), we get a palindrome (2212232322122).

The spelling of 1011011221021 in words is "one trillion, eleven billion, eleven million, two hundred twenty-one thousand, twenty-one".