42121231020111 has 16 divisors (see below), whose sum is σ = 56332117657088. Its totient is φ = 27995584953600.

The previous prime is 42121231020109. The next prime is 42121231020137. The reversal of 42121231020111 is 11102013212124.

It is not a de Polignac number, because 42121231020111 - 2¹ = 42121231020109 is a prime.

It is a super-2 number, since 2×42121231020111² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42121231022111) 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, 80082495 + ... + 80606751.

It is an arithmetic number, because the mean of its divisors is an integer number (3520757353568).

Almost surely, 2^{42121231020111} is an apocalyptic number.

42121231020111 is a deficient number, since it is larger than the sum of its proper divisors (14210886636977).

42121231020111 is a wasteful number, since it uses less digits than its factorization.

42121231020111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605502.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 42121231020111 its reverse (11102013212124), we get a palindrome (53223244232235).

The spelling of 42121231020111 in words is "forty-two trillion, one hundred twenty-one billion, two hundred thirty-one million, twenty thousand, one hundred eleven".