2001011211100 has 36 divisors (see below), whose sum is σ = 4736939269608. Its totient is φ = 727640440000.

The previous prime is 2001011211053. The next prime is 2001011211119. The reversal of 2001011211100 is 11121101002.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 909549451 + ... + 909551650.

It is an arithmetic number, because the mean of its divisors is an integer number (131581646378).

Almost surely, 2^{2001011211100} is an apocalyptic number.

2001011211100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001011211100 is an abundant number, since it is smaller than the sum of its proper divisors (2735928058508).

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

2001011211100 is a wasteful number, since it uses less digits than its factorization.

2001011211100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1819101126 (or 1819101119 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 2001011211100 its reverse (11121101002), we get a palindrome (2012132312102).

The spelling of 2001011211100 in words is "two trillion, one billion, eleven million, two hundred eleven thousand, one hundred".