42234663666021 has 16 divisors (see below), whose sum is σ = 56327663927808. Its totient is φ = 28149053894000.

The previous prime is 42234663666017. The next prime is 42234663666079. The reversal of 42234663666021 is 12066636643224.

It is a cyclic number.

It is not a de Polignac number, because 42234663666021 - 2² = 42234663666017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42234663666011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186413410 + ... + 186639836.

It is an arithmetic number, because the mean of its divisors is an integer number (3520478995488).

Almost surely, 2^{42234663666021} is an apocalyptic number.

It is an amenable number.

42234663666021 is a deficient number, since it is larger than the sum of its proper divisors (14093000261787).

42234663666021 is a wasteful number, since it uses less digits than its factorization.

42234663666021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242472.

The product of its (nonzero) digits is 8957952, while the sum is 51.

The spelling of 42234663666021 in words is "forty-two trillion, two hundred thirty-four billion, six hundred sixty-three million, six hundred sixty-six thousand, twenty-one".