101110021120021 has 4 divisors (see below), whose sum is σ = 101110325578444. Its totient is φ = 101109716661600.

The previous prime is 101110021119983. The next prime is 101110021120051. The reversal of 101110021120021 is 120021120011101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40114311619396 + 60995709500625 = 6333586^2 + 7809975^2 .

It is a cyclic number.

It is not a de Polignac number, because 101110021120021 - 2³¹ = 101107873636373 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101110021119983 and 101110021120010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101110021120051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151730520 + ... + 152395441.

It is an arithmetic number, because the mean of its divisors is an integer number (25277581394611).

Almost surely, 2^{101110021120021} is an apocalyptic number.

It is an amenable number.

101110021120021 is a deficient number, since it is larger than the sum of its proper divisors (304458423).

101110021120021 is an equidigital number, since it uses as much as digits as its factorization.

101110021120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304458422.

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

Adding to 101110021120021 its reverse (120021120011101), we get a palindrome (221131141131122).

The spelling of 101110021120021 in words is "one hundred one trillion, one hundred ten billion, twenty-one million, one hundred twenty thousand, twenty-one".