1221101234454 has 32 divisors (see below), whose sum is σ = 2456013519360. Its totient is φ = 404736893792.

The previous prime is 1221101234401. The next prime is 1221101234459. The reversal of 1221101234454 is 4544321011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221101234459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 356044 + ... + 1602800.

It is an arithmetic number, because the mean of its divisors is an integer number (76750422480).

Almost surely, 2^{1221101234454} is an apocalyptic number.

1221101234454 is an abundant number, since it is smaller than the sum of its proper divisors (1234912284906).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221101234454 is a wasteful number, since it uses less digits than its factorization.

1221101234454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247684.

The product of its (nonzero) digits is 7680, while the sum is 30.

Adding to 1221101234454 its reverse (4544321011221), we get a palindrome (5765422245675).

The spelling of 1221101234454 in words is "one trillion, two hundred twenty-one billion, one hundred one million, two hundred thirty-four thousand, four hundred fifty-four".