21101011001198 has 4 divisors (see below), whose sum is σ = 31651516501800. Its totient is φ = 10550505500598.

The previous prime is 21101011001179. The next prime is 21101011001209. The reversal of 21101011001198 is 89110011010112.

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

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, 5275252750298 + ... + 5275252750301.

It is an arithmetic number, because the mean of its divisors is an integer number (7912879125450).

Almost surely, 2^{21101011001198} is an apocalyptic number.

21101011001198 is a deficient number, since it is larger than the sum of its proper divisors (10550505500602).

21101011001198 is a wasteful number, since it uses less digits than its factorization.

21101011001198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10550505500601.

The product of its (nonzero) digits is 144, while the sum is 26.

The spelling of 21101011001198 in words is "twenty-one trillion, one hundred one billion, eleven million, one thousand, one hundred ninety-eight".