42000221212340 has 24 divisors (see below), whose sum is σ = 88205793608520. Its totient is φ = 16799073425408.

The previous prime is 42000221212331. The next prime is 42000221212409. The reversal of 42000221212340 is 4321212200024.

It can be written as a sum of positive squares in 4 ways, for example, as 23271632068624 + 18728589143716 = 4824068^2 + 4327654^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63101885 + ... + 63764004.

It is an arithmetic number, because the mean of its divisors is an integer number (3675241400355).

Almost surely, 2^{42000221212340} is an apocalyptic number.

It is an amenable number.

42000221212340 is an abundant number, since it is smaller than the sum of its proper divisors (46205572396180).

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

42000221212340 is a wasteful number, since it uses less digits than its factorization.

42000221212340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126882451 (or 126882449 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 42000221212340 its reverse (4321212200024), we get a palindrome (46321433412364).

The spelling of 42000221212340 in words is "forty-two trillion, two hundred twenty-one million, two hundred twelve thousand, three hundred forty".