71020222211021 has 32 divisors (see below), whose sum is σ = 75479516112000. Its totient is φ = 66635605628928.

The previous prime is 71020222211009. The next prime is 71020222211069. The reversal of 71020222211021 is 12011222202017.

It is a cyclic number.

It is not a de Polignac number, because 71020222211021 - 2¹⁸ = 71020221948877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71020222211321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2086787621 + ... + 2086821653.

It is an arithmetic number, because the mean of its divisors is an integer number (2358734878500).

Almost surely, 2^{71020222211021} is an apocalyptic number.

It is an amenable number.

71020222211021 is a deficient number, since it is larger than the sum of its proper divisors (4459293900979).

71020222211021 is a wasteful number, since it uses less digits than its factorization.

71020222211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36093.

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

Adding to 71020222211021 its reverse (12011222202017), we get a palindrome (83031444413038).

The spelling of 71020222211021 in words is "seventy-one trillion, twenty billion, two hundred twenty-two million, two hundred eleven thousand, twenty-one".