521422122211 has 8 divisors (see below), whose sum is σ = 524242672304. Its totient is φ = 518602798080.

The previous prime is 521422122157. The next prime is 521422122289. The reversal of 521422122211 is 112221224125.

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 521422122211 - 2¹³ = 521422114019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521422122811) 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, 552940 + ... + 1161286.

It is an arithmetic number, because the mean of its divisors is an integer number (65530334038).

Almost surely, 2^521422122211 is an apocalyptic number.

521422122211 is a deficient number, since it is larger than the sum of its proper divisors (2820550093).

521422122211 is a wasteful number, since it uses less digits than its factorization.

521422122211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612981.

The product of its digits is 1280, while the sum is 25.

Adding to 521422122211 its reverse (112221224125), we get a palindrome (633643346336).

The spelling of 521422122211 in words is "five hundred twenty-one billion, four hundred twenty-two million, one hundred twenty-two thousand, two hundred eleven".