2010721221620 has 12 divisors (see below), whose sum is σ = 4222514565444. Its totient is φ = 804288488640.

The previous prime is 2010721221611. The next prime is 2010721221643. The reversal of 2010721221620 is 261221270102.

It can be written as a sum of positive squares in 2 ways, for example, as 610314063076 + 1400407158544 = 781226^2 + 1183388^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2010721221620.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50268030521 + ... + 50268030560.

It is an arithmetic number, because the mean of its divisors is an integer number (351876213787).

Almost surely, 2^{2010721221620} is an apocalyptic number.

2010721221620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2010721221620 is an abundant number, since it is smaller than the sum of its proper divisors (2211793343824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2010721221620 is a wasteful number, since it uses less digits than its factorization.

2010721221620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100536061090 (or 100536061088 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

Adding to 2010721221620 its reverse (261221270102), we get a palindrome (2271942491722).

The spelling of 2010721221620 in words is "two trillion, ten billion, seven hundred twenty-one million, two hundred twenty-one thousand, six hundred twenty".