2111621389 has 8 divisors (see below), whose sum is σ = 2220867072. Its totient is φ = 2004946320.

The previous prime is 2111621377. The next prime is 2111621429. The reversal of 2111621389 is 9831261112.

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 2111621389 - 2¹⁵ = 2111588621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111621089) 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, 640969 + ... + 644254.

It is an arithmetic number, because the mean of its divisors is an integer number (277608384).

Almost surely, 2^2111621389 is an apocalyptic number.

It is an amenable number.

2111621389 is a deficient number, since it is larger than the sum of its proper divisors (109245683).

2111621389 is a wasteful number, since it uses less digits than its factorization.

2111621389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285307.

The product of its digits is 5184, while the sum is 34.

The square root of 2111621389 is about 45952.3817554651. The cubic root of 2111621389 is about 1282.9370602587.

The spelling of 2111621389 in words is "two billion, one hundred eleven million, six hundred twenty-one thousand, three hundred eighty-nine".