201919202001 has 16 divisors (see below), whose sum is σ = 326334064320. Its totient is φ = 122375273760.

The previous prime is 201919201943. The next prime is 201919202039. The reversal of 201919202001 is 100202919102.

It is not a de Polignac number, because 201919202001 - 2⁶ = 201919201937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (201919202701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 339931020 + ... + 339931613.

It is an arithmetic number, because the mean of its divisors is an integer number (20395879020).

Almost surely, 2^201919202001 is an apocalyptic number.

It is an amenable number.

201919202001 is a deficient number, since it is larger than the sum of its proper divisors (124414862319).

201919202001 is a wasteful number, since it uses less digits than its factorization.

201919202001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679862653 (or 679862647 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The spelling of 201919202001 in words is "two hundred one billion, nine hundred nineteen million, two hundred two thousand, one".