85206621322021 has 8 divisors (see below), whose sum is σ = 90225393438744. Its totient is φ = 80188584529920.

The previous prime is 85206621322001. The next prime is 85206621322037. The reversal of 85206621322021 is 12022312660258.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 37684693553796 + 47521927768225 = 6138786^2 + 6893615^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85206621322021 - 2¹³ = 85206621313829 is a prime.

It is a super-2 number, since 2×85206621322021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85206621322001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183592570 + ... + 184056091.

It is an arithmetic number, because the mean of its divisors is an integer number (11278174179843).

Almost surely, 2^{85206621322021} is an apocalyptic number.

It is an amenable number.

85206621322021 is a deficient number, since it is larger than the sum of its proper divisors (5018772116723).

85206621322021 is a wasteful number, since it uses less digits than its factorization.

85206621322021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367662311.

The product of its (nonzero) digits is 138240, while the sum is 40.

Adding to 85206621322021 its reverse (12022312660258), we get a palindrome (97228933982279).

The spelling of 85206621322021 in words is "eighty-five trillion, two hundred six billion, six hundred twenty-one million, three hundred twenty-two thousand, twenty-one".