122140420 has 12 divisors (see below), whose sum is σ = 256494924. Its totient is φ = 48856160.

The previous prime is 122140409. The next prime is 122140423. The reversal of 122140420 is 24041221.

It can be written as a sum of positive squares in 2 ways, for example, as 32421636 + 89718784 = 5694^2 + 9472^2 .

It is a junction number, because it is equal to n+sod(n) for n = 122140394 and 122140403.

It is not an unprimeable number, because it can be changed into a prime (122140423) 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, 3053491 + ... + 3053530.

It is an arithmetic number, because the mean of its divisors is an integer number (21374577).

Almost surely, 2^122140420 is an apocalyptic number.

122140420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122140420 is an abundant number, since it is smaller than the sum of its proper divisors (134354504).

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

122140420 is a wasteful number, since it uses less digits than its factorization.

122140420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6107030 (or 6107028 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 122140420 is about 11051.7157039077. The cubic root of 122140420 is about 496.1577769392.

Adding to 122140420 its reverse (24041221), we get a palindrome (146181641).

The spelling of 122140420 in words is "one hundred twenty-two million, one hundred forty thousand, four hundred twenty".