2111221720492 has 6 divisors (see below), whose sum is σ = 3694638010868. Its totient is φ = 1055610860244.

The previous prime is 2111221720393. The next prime is 2111221720499. The reversal of 2111221720492 is 2940271221112.

It is not an unprimeable number, because it can be changed into a prime (2111221720499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 263902715058 + ... + 263902715065.

Almost surely, 2^{2111221720492} is an apocalyptic number.

It is an amenable number.

2111221720492 is a deficient number, since it is larger than the sum of its proper divisors (1583416290376).

2111221720492 is a wasteful number, since it uses less digits than its factorization.

2111221720492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527805430127 (or 527805430125 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The spelling of 2111221720492 in words is "two trillion, one hundred eleven billion, two hundred twenty-one million, seven hundred twenty thousand, four hundred ninety-two".