2001101211992 has 16 divisors (see below), whose sum is σ = 3757863954960. Its totient is φ = 999004157344.

The previous prime is 2001101211929. The next prime is 2001101211997. The reversal of 2001101211992 is 2991121011002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001101211997) 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, 193300583 + ... + 193310934.

It is an arithmetic number, because the mean of its divisors is an integer number (234866497185).

Almost surely, 2^{2001101211992} is an apocalyptic number.

It is an amenable number.

2001101211992 is a deficient number, since it is larger than the sum of its proper divisors (1756762742968).

2001101211992 is a wasteful number, since it uses less digits than its factorization.

2001101211992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386612170 (or 386612166 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 29.

Adding to 2001101211992 its reverse (2991121011002), we get a palindrome (4992222222994).

The spelling of 2001101211992 in words is "two trillion, one billion, one hundred one million, two hundred eleven thousand, nine hundred ninety-two".