2142545241521 has 4 divisors (see below), whose sum is σ = 2142558328944. Its totient is φ = 2142532154100.

The previous prime is 2142545241503. The next prime is 2142545241539. The reversal of 2142545241521 is 1251425452412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (2142545241503) and next prime (2142545241539).

It is a cyclic number.

It is not a de Polignac number, because 2142545241521 - 2¹⁰ = 2142545240497 is a prime.

It is a super-2 number, since 2×2142545241521² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2142545241121) 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, 6294995 + ... + 6626616.

It is an arithmetic number, because the mean of its divisors is an integer number (535639582236).

Almost surely, 2^{2142545241521} is an apocalyptic number.

It is an amenable number.

2142545241521 is a deficient number, since it is larger than the sum of its proper divisors (13087423).

2142545241521 is a wasteful number, since it uses less digits than its factorization.

2142545241521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13087422.

The product of its digits is 128000, while the sum is 38.

The spelling of 2142545241521 in words is "two trillion, one hundred forty-two billion, five hundred forty-five million, two hundred forty-one thousand, five hundred twenty-one".