2111406226621 has 4 divisors (see below), whose sum is σ = 2113498800700. Its totient is φ = 2109313652544.

The previous prime is 2111406226619. The next prime is 2111406226673. The reversal of 2111406226621 is 1266226041112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 523617220996 + 1587789005625 = 723614^2 + 1260075^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111406226621 - 2¹ = 2111406226619 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 (2111406226681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1046285526 + ... + 1046287543.

It is an arithmetic number, because the mean of its divisors is an integer number (528374700175).

Almost surely, 2^{2111406226621} is an apocalyptic number.

It is an amenable number.

2111406226621 is a deficient number, since it is larger than the sum of its proper divisors (2092574079).

2111406226621 is a wasteful number, since it uses less digits than its factorization.

2111406226621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2092574078.

The product of its (nonzero) digits is 13824, while the sum is 34.

The spelling of 2111406226621 in words is "two trillion, one hundred eleven billion, four hundred six million, two hundred twenty-six thousand, six hundred twenty-one".