106158021 has 4 divisors (see below), whose sum is σ = 141544032. Its totient is φ = 70772012.

The previous prime is 106158011. The next prime is 106158023. The reversal of 106158021 is 120851601.

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.

It is a cyclic number.

It is not a de Polignac number, because 106158021 - 2⁶ = 106157957 is a prime.

It is a super-2 number, since 2×106158021² = 22539050845272882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 106157982 and 106158000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106158023) 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, 17693001 + ... + 17693006.

It is an arithmetic number, because the mean of its divisors is an integer number (35386008).

Almost surely, 2^106158021 is an apocalyptic number.

It is an amenable number.

106158021 is a deficient number, since it is larger than the sum of its proper divisors (35386011).

106158021 is an equidigital number, since it uses as much as digits as its factorization.

106158021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35386010.

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 106158021 is about 10303.3014611822. The cubic root of 106158021 is about 473.4974065313.

It can be divided in two parts, 1061580 and 21, that added together give a palindrome (1061601).

The spelling of 106158021 in words is "one hundred six million, one hundred fifty-eight thousand, twenty-one".