2010001219621 has 2 divisors, whose sum is σ = 2010001219622. Its totient is φ = 2010001219620.

The previous prime is 2010001219573. The next prime is 2010001219727. The reversal of 2010001219621 is 1269121000102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1128026671396 + 881974548225 = 1062086^2 + 939135^2 .

It is a cyclic number.

It is not a de Polignac number, because 2010001219621 - 2³¹ = 2007853735973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2010001219921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005000609810 + 1005000609811.

It is an arithmetic number, because the mean of its divisors is an integer number (1005000609811).

Almost surely, 2^{2010001219621} is an apocalyptic number.

It is an amenable number.

2010001219621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2010001219621 is an equidigital number, since it uses as much as digits as its factorization.

2010001219621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 25.

Adding to 2010001219621 its reverse (1269121000102), we get a palindrome (3279122219723).

The spelling of 2010001219621 in words is "two trillion, ten billion, one million, two hundred nineteen thousand, six hundred twenty-one".