2010111221621 has 2 divisors, whose sum is σ = 2010111221622. Its totient is φ = 2010111221620.

The previous prime is 2010111221611. The next prime is 2010111221627. The reversal of 2010111221621 is 1261221110102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1845182640625 + 164928580996 = 1358375^2 + 406114^2 .

It is a cyclic number.

It is not a de Polignac number, because 2010111221621 - 2¹⁰ = 2010111220597 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2010111221593 and 2010111221602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2010111221627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005055610810 + 1005055610811.

It is an arithmetic number, because the mean of its divisors is an integer number (1005055610811).

Almost surely, 2^{2010111221621} is an apocalyptic number.

It is an amenable number.

2010111221621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2010111221621 is an equidigital number, since it uses as much as digits as its factorization.

2010111221621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 2010111221621 its reverse (1261221110102), we get a palindrome (3271332331723).

The spelling of 2010111221621 in words is "two trillion, ten billion, one hundred eleven million, two hundred twenty-one thousand, six hundred twenty-one".