2131223100194 has 4 divisors (see below), whose sum is σ = 3196834650294. Its totient is φ = 1065611550096.

The previous prime is 2131223100161. The next prime is 2131223100211. The reversal of 2131223100194 is 4910013221312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2118698580625 + 12524519569 = 1455575^2 + 111913^2 .

It is a super-2 number, since 2×2131223100194² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 532805775047 + ... + 532805775050.

Almost surely, 2^{2131223100194} is an apocalyptic number.

2131223100194 is a deficient number, since it is larger than the sum of its proper divisors (1065611550100).

2131223100194 is a wasteful number, since it uses less digits than its factorization.

2131223100194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065611550099.

The product of its (nonzero) digits is 2592, while the sum is 29.

The spelling of 2131223100194 in words is "two trillion, one hundred thirty-one billion, two hundred twenty-three million, one hundred thousand, one hundred ninety-four".