7911200112121 has 4 divisors (see below), whose sum is σ = 7911688866192. Its totient is φ = 7910711358052.

The previous prime is 7911200112113. The next prime is 7911200112197. The reversal of 7911200112121 is 1212110021197.

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 a cyclic number.

It is not a de Polignac number, because 7911200112121 - 2³ = 7911200112113 is a prime.

It is a super-2 number, since 2×7911200112121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7911200112121.

It is not an unprimeable number, because it can be changed into a prime (7911200113121) 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, 244352755 + ... + 244385128.

It is an arithmetic number, because the mean of its divisors is an integer number (1977922216548).

Almost surely, 2^{7911200112121} is an apocalyptic number.

It is an amenable number.

7911200112121 is a deficient number, since it is larger than the sum of its proper divisors (488754071).

7911200112121 is a wasteful number, since it uses less digits than its factorization.

7911200112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488754070.

The product of its (nonzero) digits is 504, while the sum is 28.

The spelling of 7911200112121 in words is "seven trillion, nine hundred eleven billion, two hundred million, one hundred twelve thousand, one hundred twenty-one".