1000021000194 has 48 divisors (see below), whose sum is σ = 2247118237728. Its totient is φ = 333316972512.

The previous prime is 1000021000129. The next prime is 1000021000207. The reversal of 1000021000194 is 4910001200001.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7739629 + ... + 7867775.

It is an arithmetic number, because the mean of its divisors is an integer number (46814963286).

Almost surely, 2^{1000021000194} is an apocalyptic number.

1000021000194 is an abundant number, since it is smaller than the sum of its proper divisors (1247097237534).

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

1000021000194 is a wasteful number, since it uses less digits than its factorization.

1000021000194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144221 (or 144209 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1000021000194 its reverse (4910001200001), we get a palindrome (5910022200195).

The spelling of 1000021000194 in words is "one trillion, twenty-one million, one hundred ninety-four", and thus it is an aban number.