71222111220002 has 4 divisors (see below), whose sum is σ = 106833166830006. Its totient is φ = 35611055610000.

The previous prime is 71222111219977. The next prime is 71222111220019. The reversal of 71222111220002 is 20002211122217.

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., 57773087941321 + 13449023278681 = 7600861^2 + 3667291^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 71222111220002.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17805527804999 + ... + 17805527805002.

Almost surely, 2^{71222111220002} is an apocalyptic number.

71222111220002 is a deficient number, since it is larger than the sum of its proper divisors (35611055610004).

71222111220002 is a wasteful number, since it uses less digits than its factorization.

71222111220002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35611055610003.

The product of its (nonzero) digits is 448, while the sum is 23.

Adding to 71222111220002 its reverse (20002211122217), we get a palindrome (91224322342219).

The spelling of 71222111220002 in words is "seventy-one trillion, two hundred twenty-two billion, one hundred eleven million, two hundred twenty thousand, two".