7071221042 has 18 divisors (see below), whose sum is σ = 10734819543. Its totient is φ = 3493452672.

The previous prime is 7071221029. The next prime is 7071221057. The reversal of 7071221042 is 2401221707.

It can be written as a sum of positive squares in 5 ways, for example, as 261121 + 7070959921 = 511^2 + 84089^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=59461.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11535128 + ... + 11535740.

Almost surely, 2^7071221042 is an apocalyptic number.

7071221042 is a deficient number, since it is larger than the sum of its proper divisors (3663598501).

7071221042 is an frugal number, since it uses more digits than its factorization.

7071221042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422 (or 712 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 7071221042 is about 84090.5526322666. The cubic root of 7071221042 is about 1919.3969679189.

Multiplying 7071221042 by its product of nonzero digits (1568), we get a square (11087674593856 = 3329816²).

Adding to 7071221042 its reverse (2401221707), we get a palindrome (9472442749).

The spelling of 7071221042 in words is "seven billion, seventy-one million, two hundred twenty-one thousand, forty-two".