42311221020 has 96 divisors (see below), whose sum is σ = 132639978240. Its totient is φ = 11196843840.

The previous prime is 42311221019. The next prime is 42311221027. The reversal of 42311221020 is 2012211324.

It is a happy number.

42311221020 is a `hidden beast` number, since 423 + 1 + 1 + 221 + 0 + 20 = 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 = 42311220984 and 42311221002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42311221027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 228322 + ... + 369801.

It is an arithmetic number, because the mean of its divisors is an integer number (1381666440).

Almost surely, 2^42311221020 is an apocalyptic number.

It is an amenable number.

42311221020 is an abundant number, since it is smaller than the sum of its proper divisors (90328757220).

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

42311221020 is a wasteful number, since it uses less digits than its factorization.

42311221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598272 (or 598264 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 42311221020 its reverse (2012211324), we get a palindrome (44323432344).

The spelling of 42311221020 in words is "forty-two billion, three hundred eleven million, two hundred twenty-one thousand, twenty".