122217631 has 4 divisors (see below), whose sum is σ = 122240664. Its totient is φ = 122194600.

The previous prime is 122217617. The next prime is 122217643. The reversal of 122217631 is 136712221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 122217631 - 2¹⁹ = 121693343 is a prime.

It is a super-2 number, since 2×122217631² = 29874298654504322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122217596 and 122217605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122217611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 921 + ... + 15661.

It is an arithmetic number, because the mean of its divisors is an integer number (30560166).

Almost surely, 2^122217631 is an apocalyptic number.

122217631 is a deficient number, since it is larger than the sum of its proper divisors (23033).

122217631 is an equidigital number, since it uses as much as digits as its factorization.

122217631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23032.

The product of its digits is 1008, while the sum is 25.

The square root of 122217631 is about 11055.2083200634. The cubic root of 122217631 is about 496.2623035397.

Adding to 122217631 its reverse (136712221), we get a palindrome (258929852).

The spelling of 122217631 in words is "one hundred twenty-two million, two hundred seventeen thousand, six hundred thirty-one".