2102010910121 has 2 divisors, whose sum is σ = 2102010910122. Its totient is φ = 2102010910120.

The previous prime is 2102010910117. The next prime is 2102010910151. The reversal of 2102010910121 is 1210190102012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2069969910121 + 32041000000 = 1438739^2 + 179000^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102010910121 - 2² = 2102010910117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2102010910093 and 2102010910102.

It is not a weakly prime, because it can be changed into another prime (2102010910151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051005455060 + 1051005455061.

It is an arithmetic number, because the mean of its divisors is an integer number (1051005455061).

Almost surely, 2^{2102010910121} is an apocalyptic number.

It is an amenable number.

2102010910121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102010910121 is an equidigital number, since it uses as much as digits as its factorization.

2102010910121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 2102010910121 in words is "two trillion, one hundred two billion, ten million, nine hundred ten thousand, one hundred twenty-one".