106156021 has 12 divisors (see below), whose sum is σ = 112811052. Its totient is φ = 99874944.

The previous prime is 106155991. The next prime is 106156027. The reversal of 106156021 is 120651601.

It can be written as a sum of positive squares in 2 ways, for example, as 13727025 + 92428996 = 3705^2 + 9614^2 .

It is not a de Polignac number, because 106156021 - 2⁵ = 106155989 is a prime.

It is a super-2 number, since 2×106156021² = 22538201589104882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 106155983 and 106156001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106156027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55741 + ... + 57613.

It is an arithmetic number, because the mean of its divisors is an integer number (9400921).

Almost surely, 2^106156021 is an apocalyptic number.

It is an amenable number.

106156021 is a deficient number, since it is larger than the sum of its proper divisors (6655031).

106156021 is a wasteful number, since it uses less digits than its factorization.

106156021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2068 (or 2049 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 106156021 is about 10303.2044044559. The cubic root of 106156021 is about 473.4944329744.

The spelling of 106156021 in words is "one hundred six million, one hundred fifty-six thousand, twenty-one".