21142222130015 has 16 divisors (see below), whose sum is σ = 30700638522432. Its totient is φ = 13644728231424.

The previous prime is 21142222129997. The next prime is 21142222130041. The reversal of 21142222130015 is 51003122224112.

It is a cyclic number.

It is not a de Polignac number, because 21142222130015 - 2²⁰ = 21142221081439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17766572624 + ... + 17766573813.

It is an arithmetic number, because the mean of its divisors is an integer number (1918789907652).

Almost surely, 2^{21142222130015} is an apocalyptic number.

21142222130015 is a deficient number, since it is larger than the sum of its proper divisors (9558416392417).

21142222130015 is a wasteful number, since it uses less digits than its factorization.

21142222130015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35533146466.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 21142222130015 its reverse (51003122224112), we get a palindrome (72145344354127).

The spelling of 21142222130015 in words is "twenty-one trillion, one hundred forty-two billion, two hundred twenty-two million, one hundred thirty thousand, fifteen".