1220421022442 has 8 divisors (see below), whose sum is σ = 1831011899556. Its totient is φ = 610083722592.

The previous prime is 1220421022423. The next prime is 1220421022463. The reversal of 1220421022442 is 2442201240221.

It can be written as a sum of positive squares in 2 ways, for example, as 1188211182601 + 32209839841 = 1090051^2 + 179471^2 .

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

It is a super-3 number, since 3×1220421022442³ (a number of 37 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63382283 + ... + 63401534.

Almost surely, 2^{1220421022442} is an apocalyptic number.

1220421022442 is a deficient number, since it is larger than the sum of its proper divisors (610590877114).

1220421022442 is a wasteful number, since it uses less digits than its factorization.

1220421022442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126788632.

The product of its (nonzero) digits is 4096, while the sum is 26.

Adding to 1220421022442 its reverse (2442201240221), we get a palindrome (3662622262663).

The spelling of 1220421022442 in words is "one trillion, two hundred twenty billion, four hundred twenty-one million, twenty-two thousand, four hundred forty-two".