31101044242 has 4 divisors (see below), whose sum is σ = 46651566366. Its totient is φ = 15550522120.

The previous prime is 31101044209. The next prime is 31101044243. The reversal of 31101044242 is 24244010113.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24244010113 = 14939 ⋅1622867.

It can be written as a sum of positive squares in only one way, i.e., 31057365361 + 43678881 = 176231^2 + 6609^2 .

It is not an unprimeable number, because it can be changed into a prime (31101044243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7775261059 + ... + 7775261062.

Almost surely, 2^31101044242 is an apocalyptic number.

31101044242 is a deficient number, since it is larger than the sum of its proper divisors (15550522124).

31101044242 is a wasteful number, since it uses less digits than its factorization.

31101044242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15550522123.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 31101044242 its reverse (24244010113), we get a palindrome (55345054355).

The spelling of 31101044242 in words is "thirty-one billion, one hundred one million, forty-four thousand, two hundred forty-two".