122213521 has 8 divisors (see below), whose sum is σ = 123119424. Its totient is φ = 121311120.

The previous prime is 122213519. The next prime is 122213537. The reversal of 122213521 is 125312221.

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 122213521 - 2¹ = 122213519 is a prime.

It is a super-2 number, since 2×122213521² = 29872289430434882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122213551) 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, 137340 + ... + 138226.

It is an arithmetic number, because the mean of its divisors is an integer number (15389928).

Almost surely, 2^122213521 is an apocalyptic number.

It is an amenable number.

122213521 is a deficient number, since it is larger than the sum of its proper divisors (905903).

122213521 is an equidigital number, since it uses as much as digits as its factorization.

122213521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1751.

The product of its digits is 240, while the sum is 19.

The square root of 122213521 is about 11055.0224332653. The cubic root of 122213521 is about 496.2567406191.

Adding to 122213521 its reverse (125312221), we get a palindrome (247525742).

The spelling of 122213521 in words is "one hundred twenty-two million, two hundred thirteen thousand, five hundred twenty-one".