42152010121 has 4 divisors (see below), whose sum is σ = 45394472452. Its totient is φ = 38909547792.

The previous prime is 42152010073. The next prime is 42152010127. The reversal of 42152010121 is 12101025124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12799754496 + 29352255625 = 113136^2 + 171325^2 .

It is a cyclic number.

It is not a de Polignac number, because 42152010121 - 2³¹ = 40004526473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42152010127) 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, 1621231146 + ... + 1621231171.

It is an arithmetic number, because the mean of its divisors is an integer number (11348618113).

Almost surely, 2^42152010121 is an apocalyptic number.

It is an amenable number.

42152010121 is a deficient number, since it is larger than the sum of its proper divisors (3242462331).

42152010121 is a wasteful number, since it uses less digits than its factorization.

42152010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3242462330.

The product of its (nonzero) digits is 160, while the sum is 19.

Adding to 42152010121 its reverse (12101025124), we get a palindrome (54253035245).

The spelling of 42152010121 in words is "forty-two billion, one hundred fifty-two million, ten thousand, one hundred twenty-one".