31031212030202 has 4 divisors (see below), whose sum is σ = 46546818045306. Its totient is φ = 15515606015100.

The previous prime is 31031212030139. The next prime is 31031212030211. The reversal of 31031212030202 is 20203021213013.

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., 17372799188761 + 13658412841441 = 4168069^2 + 3695729^2 .

It is a super-2 number, since 2×31031212030202² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 7757803007549 + ... + 7757803007552.

Almost surely, 2^{31031212030202} is an apocalyptic number.

31031212030202 is a deficient number, since it is larger than the sum of its proper divisors (15515606015104).

31031212030202 is a wasteful number, since it uses less digits than its factorization.

31031212030202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15515606015103.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31031212030202 its reverse (20203021213013), we get a palindrome (51234233243215).

The spelling of 31031212030202 in words is "thirty-one trillion, thirty-one billion, two hundred twelve million, thirty thousand, two hundred two".