1221314642554 has 32 divisors (see below), whose sum is σ = 1897282662912. Its totient is φ = 589017528000.

The previous prime is 1221314642521. The next prime is 1221314642563. The reversal of 1221314642554 is 4552464131221.

It is a super-2 number, since 2×1221314642554² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129632764 + ... + 129642184.

It is an arithmetic number, because the mean of its divisors is an integer number (59290083216).

Almost surely, 2^{1221314642554} is an apocalyptic number.

1221314642554 is a deficient number, since it is larger than the sum of its proper divisors (675968020358).

1221314642554 is a wasteful number, since it uses less digits than its factorization.

1221314642554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16102.

The product of its digits is 230400, while the sum is 40.

Adding to 1221314642554 its reverse (4552464131221), we get a palindrome (5773778773775).

The spelling of 1221314642554 in words is "one trillion, two hundred twenty-one billion, three hundred fourteen million, six hundred forty-two thousand, five hundred fifty-four".