2102242621021 has 2 divisors, whose sum is σ = 2102242621022. Its totient is φ = 2102242621020.

The previous prime is 2102242620991. The next prime is 2102242621051. The reversal of 2102242621021 is 1201262422012.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (2102242620991) and next prime (2102242621051).

It can be written as a sum of positive squares in only one way, i.e., 1162060284121 + 940182336900 = 1077989^2 + 969630^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102242621021 - 2⁷ = 2102242620893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2102242621051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051121310510 + 1051121310511.

It is an arithmetic number, because the mean of its divisors is an integer number (1051121310511).

Almost surely, 2^{2102242621021} is an apocalyptic number.

It is an amenable number.

2102242621021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102242621021 is an equidigital number, since it uses as much as digits as its factorization.

2102242621021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 25.

The spelling of 2102242621021 in words is "two trillion, one hundred two billion, two hundred forty-two million, six hundred twenty-one thousand, twenty-one".