10121967998 has 8 divisors (see below), whose sum is σ = 15208557408. Its totient is φ = 5052448864.

The previous prime is 10121967997. The next prime is 10121968001. The reversal of 10121967998 is 89976912101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×10121967998² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10121967997) 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, 4266086 + ... + 4268457.

It is an arithmetic number, because the mean of its divisors is an integer number (1901069676).

Almost surely, 2^10121967998 is an apocalyptic number.

10121967998 is a deficient number, since it is larger than the sum of its proper divisors (5086589410).

10121967998 is an equidigital number, since it uses as much as digits as its factorization.

10121967998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8535138.

The product of its (nonzero) digits is 489888, while the sum is 53.

The spelling of 10121967998 in words is "ten billion, one hundred twenty-one million, nine hundred sixty-seven thousand, nine hundred ninety-eight".