2127221222261 has 16 divisors (see below), whose sum is σ = 2257398328320. Its totient is φ = 1997608366080.

The previous prime is 2127221222251. The next prime is 2127221222303. The reversal of 2127221222261 is 1622221227212.

It is a cyclic number.

It is not a de Polignac number, because 2127221222261 - 2⁶ = 2127221222197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2127221222251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19671980 + ... + 19779818.

It is an arithmetic number, because the mean of its divisors is an integer number (141087395520).

Almost surely, 2^{2127221222261} is an apocalyptic number.

It is an amenable number.

2127221222261 is a deficient number, since it is larger than the sum of its proper divisors (130177106059).

2127221222261 is a wasteful number, since it uses less digits than its factorization.

2127221222261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110444.

The product of its digits is 10752, while the sum is 32.

Adding to 2127221222261 its reverse (1622221227212), we get a palindrome (3749442449473).

The spelling of 2127221222261 in words is "two trillion, one hundred twenty-seven billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred sixty-one".