121428050949 has 12 divisors (see below), whose sum is σ = 175401385900. Its totient is φ = 80949582144.

The previous prime is 121428050929. The next prime is 121428050963. The reversal of 121428050949 is 949050824121.

It is a happy number.

121428050949 is a `hidden beast` number, since 1 + 21 + 4 + 2 + 80 + 509 + 49 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19910621025 + 101517429924 = 141105^2 + 318618^2 .

It is not a de Polignac number, because 121428050949 - 2²¹ = 121425953797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121428050929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 139857 + ... + 512265.

Almost surely, 2^121428050949 is an apocalyptic number.

It is an amenable number.

121428050949 is a deficient number, since it is larger than the sum of its proper divisors (53973334951).

121428050949 is a wasteful number, since it uses less digits than its factorization.

121428050949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408644 (or 408641 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 121428050949 in words is "one hundred twenty-one billion, four hundred twenty-eight million, fifty thousand, nine hundred forty-nine".