21012110203194 has 32 divisors (see below), whose sum is σ = 50938448978880. Its totient is φ = 6367306122000.

The previous prime is 21012110203187. The next prime is 21012110203213. The reversal of 21012110203194 is 49130201121012.

21012110203194 is a `hidden beast` number, since 210 + 1 + 2 + 110 + 20 + 319 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17686960857 + ... + 17686962044.

It is an arithmetic number, because the mean of its divisors is an integer number (1591826530590).

Almost surely, 2^{21012110203194} is an apocalyptic number.

21012110203194 is an abundant number, since it is smaller than the sum of its proper divisors (29926338775686).

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

21012110203194 is a wasteful number, since it uses less digits than its factorization.

21012110203194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35373922923 (or 35373922917 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The spelling of 21012110203194 in words is "twenty-one trillion, twelve billion, one hundred ten million, two hundred three thousand, one hundred ninety-four".