42121011145 has 16 divisors (see below), whose sum is σ = 52378771968. Its totient is φ = 32482897920.

The previous prime is 42121011091. The next prime is 42121011173. The reversal of 42121011145 is 54111012124.

It is a happy number.

It is not a de Polignac number, because 42121011145 - 2¹¹ = 42121009097 is a prime.

It is a super-2 number, since 2×42121011145² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 488859 + ... + 568528.

It is an arithmetic number, because the mean of its divisors is an integer number (3273673248).

Almost surely, 2^42121011145 is an apocalyptic number.

It is an amenable number.

42121011145 is a deficient number, since it is larger than the sum of its proper divisors (10257760823).

42121011145 is a wasteful number, since it uses less digits than its factorization.

42121011145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057680.

The product of its (nonzero) digits is 320, while the sum is 22.

Adding to 42121011145 its reverse (54111012124), we get a palindrome (96232023269).

The spelling of 42121011145 in words is "forty-two billion, one hundred twenty-one million, eleven thousand, one hundred forty-five".