1222590018778 has 8 divisors (see below), whose sum is σ = 1833913546272. Its totient is φ = 611285503356.

The previous prime is 1222590018773. The next prime is 1222590018799. The reversal of 1222590018778 is 8778100952221.

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

It is a super-2 number, since 2×1222590018778² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1222590018773) 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, 4591150 + ... + 4850137.

It is an arithmetic number, because the mean of its divisors is an integer number (229239193284).

Almost surely, 2^{1222590018778} is an apocalyptic number.

1222590018778 is a deficient number, since it is larger than the sum of its proper divisors (611323527494).

1222590018778 is an equidigital number, since it uses as much as digits as its factorization.

1222590018778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9506036.

The product of its (nonzero) digits is 1128960, while the sum is 52.

The spelling of 1222590018778 in words is "one trillion, two hundred twenty-two billion, five hundred ninety million, eighteen thousand, seven hundred seventy-eight".