1225540455221 has 8 divisors (see below), whose sum is σ = 1297652970240. Its totient is φ = 1153430373568.

The previous prime is 1225540455211. The next prime is 1225540455253.

1225540455221 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 1225540455221 - 2⁶ = 1225540455157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225540455211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 484700 + ... + 1638906.

It is an arithmetic number, because the mean of its divisors is an integer number (162206621280).

Almost surely, 2^{1225540455221} is an apocalyptic number.

It is an amenable number.

1225540455221 is a deficient number, since it is larger than the sum of its proper divisors (72112515019).

1225540455221 is a wasteful number, since it uses less digits than its factorization.

1225540455221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216683.

The product of its (nonzero) digits is 160000, while the sum is 38.

The spelling of 1225540455221 in words is "one trillion, two hundred twenty-five billion, five hundred forty million, four hundred fifty-five thousand, two hundred twenty-one".