42010421220 has 144 divisors (see below), whose sum is σ = 133576515072. Its totient is φ = 10675284480.

The previous prime is 42010421191. The next prime is 42010421231. The reversal of 42010421220 is 2212401024.

42010421220 is a `hidden beast` number, since 4 + 20 + 1 + 0 + 421 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 42010421193 and 42010421202.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 251149 + ... + 383531.

It is an arithmetic number, because the mean of its divisors is an integer number (927614688).

Almost surely, 2^42010421220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42010421220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66788257536).

42010421220 is an abundant number, since it is smaller than the sum of its proper divisors (91566093852).

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

42010421220 is a wasteful number, since it uses less digits than its factorization.

42010421220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132482 (or 132477 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 42010421220 its reverse (2212401024), we get a palindrome (44222822244).

The spelling of 42010421220 in words is "forty-two billion, ten million, four hundred twenty-one thousand, two hundred twenty".