19901012001 has 8 divisors (see below), whose sum is σ = 28575812160. Its totient is φ = 12246776592.

The previous prime is 19901011973. The next prime is 19901012057. The reversal of 19901012001 is 10021010991.

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

It is not a de Polignac number, because 19901012001 - 2⁹ = 19901011489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19901012071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255141141 + ... + 255141218.

It is an arithmetic number, because the mean of its divisors is an integer number (3571976520).

Almost surely, 2^19901012001 is an apocalyptic number.

It is an amenable number.

19901012001 is a deficient number, since it is larger than the sum of its proper divisors (8674800159).

19901012001 is a wasteful number, since it uses less digits than its factorization.

19901012001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510282375.

The product of its (nonzero) digits is 162, while the sum is 24.

Adding to 19901012001 its reverse (10021010991), we get a palindrome (29922022992).

The spelling of 19901012001 in words is "nineteen billion, nine hundred one million, twelve thousand, one".