1001200253511 has 4 divisors (see below), whose sum is σ = 1334933671352. Its totient is φ = 667466835672.

The previous prime is 1001200253509. The next prime is 1001200253519. The reversal of 1001200253511 is 1153520021001.

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

It is not a de Polignac number, because 1001200253511 - 2¹ = 1001200253509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001200253519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166866708916 + ... + 166866708921.

It is an arithmetic number, because the mean of its divisors is an integer number (333733417838).

Almost surely, 2^{1001200253511} is an apocalyptic number.

1001200253511 is a deficient number, since it is larger than the sum of its proper divisors (333733417841).

1001200253511 is an equidigital number, since it uses as much as digits as its factorization.

1001200253511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333733417840.

The product of its (nonzero) digits is 300, while the sum is 21.

Adding to 1001200253511 its reverse (1153520021001), we get a palindrome (2154720274512).

The spelling of 1001200253511 in words is "one trillion, one billion, two hundred million, two hundred fifty-three thousand, five hundred eleven".