121628471240 has 16 divisors (see below), whose sum is σ = 273664060380. Its totient is φ = 48651388480.

The previous prime is 121628471221. The next prime is 121628471273. The reversal of 121628471240 is 42174826121.

It can be written as a sum of positive squares in 2 ways, for example, as 118596206884 + 3032264356 = 344378^2 + 55066^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121628471194 and 121628471203.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1520355851 + ... + 1520355930.

Almost surely, 2^121628471240 is an apocalyptic number.

121628471240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121628471240 is an abundant number, since it is smaller than the sum of its proper divisors (152035589140).

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

121628471240 is a wasteful number, since it uses less digits than its factorization.

121628471240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3040711792 (or 3040711788 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 38.

The spelling of 121628471240 in words is "one hundred twenty-one billion, six hundred twenty-eight million, four hundred seventy-one thousand, two hundred forty".