2100001211000 has 256 divisors, whose sum is σ = 6486938265600. Its totient is φ = 616042752000.

The previous prime is 2100001210997. The next prime is 2100001211107. The reversal of 2100001211000 is 1121000012.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 506861 + ... + 2111139.

It is an arithmetic number, because the mean of its divisors is an integer number (25339602600).

Almost surely, 2^{2100001211000} is an apocalyptic number.

2100001211000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2100001211000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3243469132800).

2100001211000 is an abundant number, since it is smaller than the sum of its proper divisors (4386937054600).

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

2100001211000 is a wasteful number, since it uses less digits than its factorization.

2100001211000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1604335 (or 1604321 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 2100001211000 its reverse (1121000012), we get a palindrome (2101122211012).

It can be divided in two parts, 21000012 and 11000, that added together give a palindrome (21011012).

The spelling of 2100001211000 in words is "two trillion, one hundred billion, one million, two hundred eleven thousand".