5211111650061 has 4 divisors (see below), whose sum is σ = 6948148866752. Its totient is φ = 3474074433372.

The previous prime is 5211111650051. The next prime is 5211111650113. The reversal of 5211111650061 is 1600561111125.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 5211111650061 - 2¹⁸ = 5211111387917 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 (5211111650011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 868518608341 + ... + 868518608346.

It is an arithmetic number, because the mean of its divisors is an integer number (1737037216688).

Almost surely, 2^{5211111650061} is an apocalyptic number.

It is an amenable number.

5211111650061 is a deficient number, since it is larger than the sum of its proper divisors (1737037216691).

5211111650061 is a wasteful number, since it uses less digits than its factorization.

5211111650061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1737037216690.

The product of its (nonzero) digits is 1800, while the sum is 30.

Adding to 5211111650061 its reverse (1600561111125), we get a palindrome (6811672761186).

The spelling of 5211111650061 in words is "five trillion, two hundred eleven billion, one hundred eleven million, six hundred fifty thousand, sixty-one".