106440230225021 has 24 divisors (see below), whose sum is σ = 135077856690816. Its totient is φ = 82938334691520.

The previous prime is 106440230224903. The next prime is 106440230225057. The reversal of 106440230225021 is 120522032044601.

It is a de Polignac number, because none of the positive numbers 2^k-106440230225021 is a prime.

It is a super-2 number, since 2×106440230225021² (a number of 29 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 (106440230225221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18927425 + ... + 23898281.

It is an arithmetic number, because the mean of its divisors is an integer number (5628244028784).

Almost surely, 2^{106440230225021} is an apocalyptic number.

106440230225021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

106440230225021 is a deficient number, since it is larger than the sum of its proper divisors (28637626465795).

106440230225021 is a wasteful number, since it uses less digits than its factorization.

106440230225021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5010609 (or 5010602 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 106440230225021 its reverse (120522032044601), we get a palindrome (226962262269622).

The spelling of 106440230225021 in words is "one hundred six trillion, four hundred forty billion, two hundred thirty million, two hundred twenty-five thousand, twenty-one".