225142221122021 has 8 divisors (see below), whose sum is σ = 257305602124800. Its totient is φ = 192978891758448.

The previous prime is 225142221122009. The next prime is 225142221122041. The reversal of 225142221122021 is 120221122241522.

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 225142221122021 - 2⁶ = 225142221121957 is a prime.

It is a super-2 number, since 2×225142221122021² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225142221122041) 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, 3066821 + ... + 21440378.

It is an arithmetic number, because the mean of its divisors is an integer number (32163200265600).

Almost surely, 2^{225142221122021} is an apocalyptic number.

It is an amenable number.

225142221122021 is a deficient number, since it is larger than the sum of its proper divisors (32163381002779).

225142221122021 is a wasteful number, since it uses less digits than its factorization.

225142221122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25819603.

The product of its (nonzero) digits is 5120, while the sum is 29.

Adding to 225142221122021 its reverse (120221122241522), we get a palindrome (345363343363543).

The spelling of 225142221122021 in words is "two hundred twenty-five trillion, one hundred forty-two billion, two hundred twenty-one million, one hundred twenty-two thousand, twenty-one".