122117421 has 8 divisors (see below), whose sum is σ = 166287744. Its totient is φ = 79679360.

The previous prime is 122117417. The next prime is 122117423. The reversal of 122117421 is 124711221.

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 122117421 - 2² = 122117417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122117423) 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, 432900 + ... + 433181.

It is an arithmetic number, because the mean of its divisors is an integer number (20785968).

Almost surely, 2^122117421 is an apocalyptic number.

It is an amenable number.

122117421 is a deficient number, since it is larger than the sum of its proper divisors (44170323).

122117421 is an equidigital number, since it uses as much as digits as its factorization.

122117421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866131.

The product of its digits is 224, while the sum is 21.

The square root of 122117421 is about 11050.6751377461. The cubic root of 122117421 is about 496.1266328702.

Adding to 122117421 its reverse (124711221), we get a palindrome (246828642).

The spelling of 122117421 in words is "one hundred twenty-two million, one hundred seventeen thousand, four hundred twenty-one".