33331220042 has 4 divisors (see below), whose sum is σ = 49996830066. Its totient is φ = 16665610020.

The previous prime is 33331220011. The next prime is 33331220059. The reversal of 33331220042 is 24002213333.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 22496700121 + 10834519921 = 149989^2 + 104089^2 .

It is a super-2 number, since 2×33331220042² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8332805009 + ... + 8332805012.

Almost surely, 2^33331220042 is an apocalyptic number.

33331220042 is a deficient number, since it is larger than the sum of its proper divisors (16665610024).

33331220042 is a wasteful number, since it uses less digits than its factorization.

33331220042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16665610023.

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 33331220042 its reverse (24002213333), we get a palindrome (57333433375).

The spelling of 33331220042 in words is "thirty-three billion, three hundred thirty-one million, two hundred twenty thousand, forty-two".