101121101778 has 8 divisors (see below), whose sum is σ = 202242203568. Its totient is φ = 33707033924.

The previous prime is 101121101777. The next prime is 101121101779. The reversal of 101121101778 is 877101121101.

It is an interprime number because it is at equal distance from previous prime (101121101777) and next prime (101121101779).

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

101121101778 is an admirable number.

It is a super-2 number, since 2×101121101778² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (101121101773) 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, 8426758476 + ... + 8426758487.

It is an arithmetic number, because the mean of its divisors is an integer number (25280275446).

Almost surely, 2^101121101778 is an apocalyptic number.

101121101778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

101121101778 is a wasteful number, since it uses less digits than its factorization.

101121101778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16853516968.

The product of its (nonzero) digits is 784, while the sum is 30.

Adding to 101121101778 its reverse (877101121101), we get a palindrome (978222222879).

The spelling of 101121101778 in words is "one hundred one billion, one hundred twenty-one million, one hundred one thousand, seven hundred seventy-eight".