1222120051655 has 16 divisors (see below), whose sum is σ = 1469273438304. Its totient is φ = 975876894720.

The previous prime is 1222120051627. The next prime is 1222120051667. The reversal of 1222120051655 is 5561500212221.

It is a happy number.

It is not a de Polignac number, because 1222120051655 - 2¹² = 1222120047559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27359219 + ... + 27403851.

It is an arithmetic number, because the mean of its divisors is an integer number (91829589894).

Almost surely, 2^{1222120051655} is an apocalyptic number.

1222120051655 is a deficient number, since it is larger than the sum of its proper divisors (247153386649).

1222120051655 is an equidigital number, since it uses as much as digits as its factorization.

1222120051655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54706.

The product of its (nonzero) digits is 12000, while the sum is 32.

Adding to 1222120051655 its reverse (5561500212221), we get a palindrome (6783620263876).

The spelling of 1222120051655 in words is "one trillion, two hundred twenty-two billion, one hundred twenty million, fifty-one thousand, six hundred fifty-five".