123122121000 has 64 divisors (see below), whose sum is σ = 384141026880. Its totient is φ = 32832564800.

The previous prime is 123122120941. The next prime is 123122121007. The reversal of 123122121000 is 121221321.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (123122121007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20517354 + ... + 20523353.

It is an arithmetic number, because the mean of its divisors is an integer number (6002203545).

Almost surely, 2^123122121000 is an apocalyptic number.

123122121000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123122121000 is an abundant number, since it is smaller than the sum of its proper divisors (261018905880).

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

123122121000 is a wasteful number, since it uses less digits than its factorization.

123122121000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41040731 (or 41040717 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 123122121000 its reverse (121221321), we get a palindrome (123243342321).

It can be divided in two parts, 12312 and 2121000, that added together give a palindrome (2133312).

The spelling of 123122121000 in words is "one hundred twenty-three billion, one hundred twenty-two million, one hundred twenty-one thousand".