122212640 has 48 divisors (see below), whose sum is σ = 314979840. Its totient is φ = 44440320.

The previous prime is 122212637. The next prime is 122212667. The reversal of 122212640 is 46212221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32960 + ... + 36479.

It is an arithmetic number, because the mean of its divisors is an integer number (6562080).

Almost surely, 2^122212640 is an apocalyptic number.

122212640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122212640 is an abundant number, since it is smaller than the sum of its proper divisors (192767200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122212640 is a wasteful number, since it uses less digits than its factorization.

122212640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69465 (or 69457 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 122212640 is about 11054.9825870510. The cubic root of 122212640 is about 496.2555481617.

Adding to 122212640 its reverse (46212221), we get a palindrome (168424861).

The spelling of 122212640 in words is "one hundred twenty-two million, two hundred twelve thousand, six hundred forty".