106115213021 has 4 divisors (see below), whose sum is σ = 106117383132. Its totient is φ = 106113042912.

The previous prime is 106115212991. The next prime is 106115213027. The reversal of 106115213021 is 120312511601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120312511601 = 401 ⋅300031201.

It can be written as a sum of positive squares in 2 ways, for example, as 105293760100 + 821452921 = 324490^2 + 28661^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-106115213021 is a prime.

It is a super-2 number, since 2×106115213021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106115213027) 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, 1009976 + ... + 1110081.

It is an arithmetic number, because the mean of its divisors is an integer number (26529345783).

Almost surely, 2^106115213021 is an apocalyptic number.

It is an amenable number.

106115213021 is a deficient number, since it is larger than the sum of its proper divisors (2170111).

106115213021 is an equidigital number, since it uses as much as digits as its factorization.

106115213021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2170110.

The product of its (nonzero) digits is 360, while the sum is 23.

Adding to 106115213021 its reverse (120312511601), we get a palindrome (226427724622).

The spelling of 106115213021 in words is "one hundred six billion, one hundred fifteen million, two hundred thirteen thousand, twenty-one".