42121203015 has 64 divisors (see below), whose sum is σ = 70063257600. Its totient is φ = 21592396800.

The previous prime is 42121203011. The next prime is 42121203053. The reversal of 42121203015 is 51030212124.

It is not a de Polignac number, because 42121203015 - 2² = 42121203011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42121202982 and 42121203000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42121203011) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 39401901 + ... + 39402969.

It is an arithmetic number, because the mean of its divisors is an integer number (1094738400).

Almost surely, 2^42121203015 is an apocalyptic number.

42121203015 is a deficient number, since it is larger than the sum of its proper divisors (27942054585).

42121203015 is a wasteful number, since it uses less digits than its factorization.

42121203015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2008.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 42121203015 its reverse (51030212124), we get a palindrome (93151415139).

The spelling of 42121203015 in words is "forty-two billion, one hundred twenty-one million, two hundred three thousand, fifteen".