21121010102041 has 2 divisors, whose sum is σ = 21121010102042. Its totient is φ = 21121010102040.

The previous prime is 21121010102039. The next prime is 21121010102063. The reversal of 21121010102041 is 14020101012112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18629755088400 + 2491255013641 = 4316220^2 + 1578371^2 .

It is a cyclic number.

It is not a de Polignac number, because 21121010102041 - 2¹ = 21121010102039 is a prime.

Together with 21121010102039, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21121010109041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560505051020 + 10560505051021.

It is an arithmetic number, because the mean of its divisors is an integer number (10560505051021).

Almost surely, 2^{21121010102041} is an apocalyptic number.

It is an amenable number.

21121010102041 is a deficient number, since it is larger than the sum of its proper divisors (1).

21121010102041 is an equidigital number, since it uses as much as digits as its factorization.

21121010102041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21121010102041 its reverse (14020101012112), we get a palindrome (35141111114153).

The spelling of 21121010102041 in words is "twenty-one trillion, one hundred twenty-one billion, ten million, one hundred two thousand, forty-one".