42121013020 has 24 divisors (see below), whose sum is σ = 89573803200. Its totient is φ = 16635133632.

The previous prime is 42121013003. The next prime is 42121013023. The reversal of 42121013020 is 2031012124.

It is a junction number, because it is equal to n+sod(n) for n = 42121012985 and 42121013003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42121013023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13327855 + ... + 13331014.

It is an arithmetic number, because the mean of its divisors is an integer number (3732241800).

Almost surely, 2^42121013020 is an apocalyptic number.

It is an amenable number.

42121013020 is an abundant number, since it is smaller than the sum of its proper divisors (47452790180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42121013020 is a wasteful number, since it uses less digits than its factorization.

42121013020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26658957 (or 26658955 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 42121013020 its reverse (2031012124), we get a palindrome (44152025144).

The spelling of 42121013020 in words is "forty-two billion, one hundred twenty-one million, thirteen thousand, twenty".