49999976121 has 4 divisors (see below), whose sum is σ = 66666634832. Its totient is φ = 33333317412.

The previous prime is 49999976111. The next prime is 49999976123. The reversal of 49999976121 is 12167999994.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 49999976121 - 2¹³ = 49999967929 is a prime.

It is a super-2 number, since 2×49999976121² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (49999976123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8333329351 + ... + 8333329356.

It is an arithmetic number, because the mean of its divisors is an integer number (16666658708).

Almost surely, 2^49999976121 is an apocalyptic number.

It is an amenable number.

49999976121 is a deficient number, since it is larger than the sum of its proper divisors (16666658711).

49999976121 is a wasteful number, since it uses less digits than its factorization.

49999976121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16666658710.

The product of its digits is 19840464, while the sum is 66.

The spelling of 49999976121 in words is "forty-nine billion, nine hundred ninety-nine million, nine hundred seventy-six thousand, one hundred twenty-one".