201019201000 has 32 divisors (see below), whose sum is σ = 470384932680. Its totient is φ = 80407680000.

The previous prime is 201019200973. The next prime is 201019201027. The reversal of 201019201000 is 102910102.

It is an interprime number because it is at equal distance from previous prime (201019200973) and next prime (201019201027).

It can be written as a sum of positive squares in 4 ways, for example, as 15321983524 + 185697217476 = 123782^2 + 430926^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100508601 + ... + 100510600.

Almost surely, 2^201019201000 is an apocalyptic number.

201019201000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201019201000 is an abundant number, since it is smaller than the sum of its proper divisors (269365731680).

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

201019201000 is a wasteful number, since it uses less digits than its factorization.

201019201000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201019222 (or 201019208 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

The spelling of 201019201000 in words is "two hundred one billion, nineteen million, two hundred one thousand".