221023101110021 has 16 divisors (see below), whose sum is σ = 255328394407680. Its totient is φ = 187406082864000.

The previous prime is 221023101109999. The next prime is 221023101110023. The reversal of 221023101110021 is 120011101320122.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-221023101110021 is a prime.

It is a super-2 number, since 2×221023101110021² (a number of 29 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 (221023101110023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 234275105 + ... + 235216646.

It is an arithmetic number, because the mean of its divisors is an integer number (15958024650480).

Almost surely, 2^{221023101110021} is an apocalyptic number.

It is an amenable number.

221023101110021 is a deficient number, since it is larger than the sum of its proper divisors (34305293297659).

221023101110021 is a wasteful number, since it uses less digits than its factorization.

221023101110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469492484.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 221023101110021 its reverse (120011101320122), we get a palindrome (341034202430143).

The spelling of 221023101110021 in words is "two hundred twenty-one trillion, twenty-three billion, one hundred one million, one hundred ten thousand, twenty-one".