110100120021 has 80 divisors (see below), whose sum is σ = 177887888640. Its totient is φ = 67635025920.

The previous prime is 110100120019. The next prime is 110100120023. The reversal of 110100120021 is 120021001011.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (110100120019) and next prime (110100120023).

It is not a de Polignac number, because 110100120021 - 2¹ = 110100120019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 110100119985 and 110100120012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110100120023) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 22271476 + ... + 22276418.

It is an arithmetic number, because the mean of its divisors is an integer number (2223598608).

Almost surely, 2^110100120021 is an apocalyptic number.

It is an amenable number.

110100120021 is a deficient number, since it is larger than the sum of its proper divisors (67787768619).

110100120021 is a wasteful number, since it uses less digits than its factorization.

110100120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5368 (or 5359 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 110100120021 its reverse (120021001011), we get a palindrome (230121121032).

The spelling of 110100120021 in words is "one hundred ten billion, one hundred million, one hundred twenty thousand, twenty-one".