2111221209977 has 8 divisors (see below), whose sum is σ = 2309163863040. Its totient is φ = 1914280798960.

The previous prime is 2111221209949. The next prime is 2111221210013. The reversal of 2111221209977 is 7799021221112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2111221209977 - 2¹² = 2111221205881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2111221209277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250556102 + ... + 250564527.

It is an arithmetic number, because the mean of its divisors is an integer number (288645482880).

Almost surely, 2^{2111221209977} is an apocalyptic number.

It is an amenable number.

2111221209977 is a deficient number, since it is larger than the sum of its proper divisors (197942653063).

2111221209977 is a wasteful number, since it uses less digits than its factorization.

2111221209977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501121023.

The product of its (nonzero) digits is 63504, while the sum is 44.

The spelling of 2111221209977 in words is "two trillion, one hundred eleven billion, two hundred twenty-one million, two hundred nine thousand, nine hundred seventy-seven".