1211011320194 has 64 divisors (see below), whose sum is σ = 2062435060224. Its totient is φ = 529583394816.

The previous prime is 1211011320149. The next prime is 1211011320199. The reversal of 1211011320194 is 4910231101121.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (1211011320199) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5835722 + ... + 6039674.

It is an arithmetic number, because the mean of its divisors is an integer number (32225547816).

Almost surely, 2^{1211011320194} is an apocalyptic number.

1211011320194 is a deficient number, since it is larger than the sum of its proper divisors (851423740030).

1211011320194 is a wasteful number, since it uses less digits than its factorization.

1211011320194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204171.

The product of its (nonzero) digits is 432, while the sum is 26.

The spelling of 1211011320194 in words is "one trillion, two hundred eleven billion, eleven million, three hundred twenty thousand, one hundred ninety-four".