111021642101 has 4 divisors (see below), whose sum is σ = 111579540000. Its totient is φ = 110463744204.

The previous prime is 111021642097. The next prime is 111021642157. The reversal of 111021642101 is 101246120111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 101246120111 = 38153 ⋅2653687.

It is a cyclic number.

It is not a de Polignac number, because 111021642101 - 2² = 111021642097 is a prime.

It is a super-3 number, since 3×111021642101³ (a number of 34 digits) contains 333 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 (111021644101) 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, 278948651 + ... + 278949048.

It is an arithmetic number, because the mean of its divisors is an integer number (27894885000).

Almost surely, 2^111021642101 is an apocalyptic number.

It is an amenable number.

111021642101 is a deficient number, since it is larger than the sum of its proper divisors (557897899).

111021642101 is an equidigital number, since it uses as much as digits as its factorization.

111021642101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557897898.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 111021642101 its reverse (101246120111), we get a palindrome (212267762212).

The spelling of 111021642101 in words is "one hundred eleven billion, twenty-one million, six hundred forty-two thousand, one hundred one".