2122776021 has 8 divisors (see below), whose sum is σ = 2836181824. Its totient is φ = 1412277120.

The previous prime is 2122776013. The next prime is 2122776023. The reversal of 2122776021 is 1206772212.

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

It is not a de Polignac number, because 2122776021 - 2³ = 2122776013 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2122776021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122776023) 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, 725020 + ... + 727941.

It is an arithmetic number, because the mean of its divisors is an integer number (354522728).

Almost surely, 2^2122776021 is an apocalyptic number.

It is an amenable number.

2122776021 is a deficient number, since it is larger than the sum of its proper divisors (713405803).

2122776021 is a wasteful number, since it uses less digits than its factorization.

2122776021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1453451.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 2122776021 is about 46073.5935325214. The cubic root of 2122776021 is about 1285.1921308298.

The spelling of 2122776021 in words is "two billion, one hundred twenty-two million, seven hundred seventy-six thousand, twenty-one".