42020111051 has 4 divisors (see below), whose sum is σ = 42187522104. Its totient is φ = 41852700000.

The previous prime is 42020111041. The next prime is 42020111069. The reversal of 42020111051 is 15011102024.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42020111051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42020111011) 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, 83705150 + ... + 83705651.

It is an arithmetic number, because the mean of its divisors is an integer number (10546880526).

Almost surely, 2^42020111051 is an apocalyptic number.

42020111051 is a deficient number, since it is larger than the sum of its proper divisors (167411053).

42020111051 is a wasteful number, since it uses less digits than its factorization.

42020111051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167411052.

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 42020111051 its reverse (15011102024), we get a palindrome (57031213075).

The spelling of 42020111051 in words is "forty-two billion, twenty million, one hundred eleven thousand, fifty-one".