1115225420221 has 16 divisors (see below), whose sum is σ = 1220246995968. Its totient is φ = 1010811553200.

The previous prime is 1115225420191. The next prime is 1115225420261. The reversal of 1115225420221 is 1220245225111.

It is a cyclic number.

It is not a de Polignac number, because 1115225420221 - 2¹³ = 1115225412029 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1115225420221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115225420261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16125606 + ... + 16194616.

It is an arithmetic number, because the mean of its divisors is an integer number (76265437248).

Almost surely, 2^{1115225420221} is an apocalyptic number.

1115225420221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1115225420221 is a deficient number, since it is larger than the sum of its proper divisors (105021575747).

1115225420221 is a wasteful number, since it uses less digits than its factorization.

1115225420221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73392.

The product of its (nonzero) digits is 3200, while the sum is 28.

The spelling of 1115225420221 in words is "one trillion, one hundred fifteen billion, two hundred twenty-five million, four hundred twenty thousand, two hundred twenty-one".