70122071881 has 2 divisors, whose sum is σ = 70122071882. Its totient is φ = 70122071880.

The previous prime is 70122071879. The next prime is 70122071923. The reversal of 70122071881 is 18817022107.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70108448400 + 13623481 = 264780^2 + 3691^2 .

It is a cyclic number.

It is not a de Polignac number, because 70122071881 - 2¹ = 70122071879 is a prime.

It is a super-2 number, since 2×70122071881² (a number of 22 digits) contains 22 as substring.

Together with 70122071879, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 70122071881.

It is not a weakly prime, because it can be changed into another prime (70122078881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35061035940 + 35061035941.

It is an arithmetic number, because the mean of its divisors is an integer number (35061035941).

Almost surely, 2^70122071881 is an apocalyptic number.

It is an amenable number.

70122071881 is a deficient number, since it is larger than the sum of its proper divisors (1).

70122071881 is an equidigital number, since it uses as much as digits as its factorization.

70122071881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12544, while the sum is 37.

Adding to 70122071881 its reverse (18817022107), we get a palindrome (88939093988).

The spelling of 70122071881 in words is "seventy billion, one hundred twenty-two million, seventy-one thousand, eight hundred eighty-one".