101199801478 has 4 divisors (see below), whose sum is σ = 151799702220. Its totient is φ = 50599900738.

The previous prime is 101199801463. The next prime is 101199801491. The reversal of 101199801478 is 874108991101.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×101199801478² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25299950368 + ... + 25299950371.

It is an arithmetic number, because the mean of its divisors is an integer number (37949925555).

Almost surely, 2^101199801478 is an apocalyptic number.

101199801478 is a deficient number, since it is larger than the sum of its proper divisors (50599900742).

101199801478 is an equidigital number, since it uses as much as digits as its factorization.

101199801478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50599900741.

The product of its (nonzero) digits is 145152, while the sum is 49.

The spelling of 101199801478 in words is "one hundred one billion, one hundred ninety-nine million, eight hundred one thousand, four hundred seventy-eight".