2106293721 has 8 divisors (see below), whose sum is σ = 3209590464. Its totient is φ = 1203596400.

The previous prime is 2106293711. The next prime is 2106293771. The reversal of 2106293721 is 1273926012.

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

It is not a de Polignac number, because 2106293721 - 2⁵ = 2106293689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2106293711) 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, 50149830 + ... + 50149871.

It is an arithmetic number, because the mean of its divisors is an integer number (401198808).

Almost surely, 2^2106293721 is an apocalyptic number.

2106293721 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2106293721 is a deficient number, since it is larger than the sum of its proper divisors (1103296743).

2106293721 is a wasteful number, since it uses less digits than its factorization.

2106293721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100299711.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 2106293721 is about 45894.3757011684. The cubic root of 2106293721 is about 1281.8571919378.

The spelling of 2106293721 in words is "two billion, one hundred six million, two hundred ninety-three thousand, seven hundred twenty-one".