7901120211121 has 4 divisors (see below), whose sum is σ = 7921749768192. Its totient is φ = 7880490654052.

The previous prime is 7901120211037. The next prime is 7901120211157. The reversal of 7901120211121 is 1211120211097.

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 7901120211121 - 2¹³ = 7901120202929 is a prime.

It is a super-2 number, since 2×7901120211121² (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 7901120211121.

It is not an unprimeable number, because it can be changed into a prime (7901120211221) 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, 10314777961 + ... + 10314778726.

It is an arithmetic number, because the mean of its divisors is an integer number (1980437442048).

Almost surely, 2^{7901120211121} is an apocalyptic number.

It is an amenable number.

7901120211121 is a deficient number, since it is larger than the sum of its proper divisors (20629557071).

7901120211121 is a wasteful number, since it uses less digits than its factorization.

7901120211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20629557070.

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

The spelling of 7901120211121 in words is "seven trillion, nine hundred one billion, one hundred twenty million, two hundred eleven thousand, one hundred twenty-one".