1254420500221 has 8 divisors (see below), whose sum is σ = 1434415063104. Its totient is φ = 1074623845920.

The previous prime is 1254420500209. The next prime is 1254420500233. The reversal of 1254420500221 is 1220050244521.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1254420500209) and next prime (1254420500233).

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

It is a cyclic number.

It is not a de Polignac number, because 1254420500221 - 2⁵ = 1254420500189 is a prime.

It is a super-2 number, since 2×1254420500221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1254420500221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1254420503221) 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, 49463560 + ... + 49488913.

It is an arithmetic number, because the mean of its divisors is an integer number (179301882888).

Almost surely, 2^{1254420500221} is an apocalyptic number.

It is an amenable number.

1254420500221 is a deficient number, since it is larger than the sum of its proper divisors (179994562883).

1254420500221 is an equidigital number, since it uses as much as digits as its factorization.

1254420500221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98954291.

The product of its (nonzero) digits is 6400, while the sum is 28.

Adding to 1254420500221 its reverse (1220050244521), we get a palindrome (2474470744742).

The spelling of 1254420500221 in words is "one trillion, two hundred fifty-four billion, four hundred twenty million, five hundred thousand, two hundred twenty-one".