2220962381921 has 8 divisors (see below), whose sum is σ = 2241451746600. Its totient is φ = 2200475082240.

The previous prime is 2220962381899. The next prime is 2220962381927. The reversal of 2220962381921 is 1291832690222.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1766868343696 + 454094038225 = 1329236^2 + 673865^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2220962381921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2220962381927) 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, 1687931 + ... + 2700191.

It is an arithmetic number, because the mean of its divisors is an integer number (280181468325).

Almost surely, 2^{2220962381921} is an apocalyptic number.

It is an amenable number.

2220962381921 is a deficient number, since it is larger than the sum of its proper divisors (20489364679).

2220962381921 is a wasteful number, since it uses less digits than its factorization.

2220962381921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032499.

The product of its (nonzero) digits is 373248, while the sum is 47.

The spelling of 2220962381921 in words is "two trillion, two hundred twenty billion, nine hundred sixty-two million, three hundred eighty-one thousand, nine hundred twenty-one".