2111210001000 has 384 divisors, whose sum is σ = 7572316752000. Its totient is φ = 549893836800.

The previous prime is 2111210000953. The next prime is 2111210001001. The reversal of 2111210001000 is 1000121112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (2111210001001) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10347976 + ... + 10550024.

It is an arithmetic number, because the mean of its divisors is an integer number (19719574875).

Almost surely, 2^{2111210001000} is an apocalyptic number.

2111210001000 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 2111210001000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3786158376000).

2111210001000 is an abundant number, since it is smaller than the sum of its proper divisors (5461106751000).

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

2111210001000 is a wasteful number, since it uses less digits than its factorization.

2111210001000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202128 (or 202102 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 2111210001000 its reverse (1000121112), we get a palindrome (2112210122112).

The spelling of 2111210001000 in words is "two trillion, one hundred eleven billion, two hundred ten million, one thousand".