21221300012141 has 2 divisors, whose sum is σ = 21221300012142. Its totient is φ = 21221300012140.

The previous prime is 21221300012083. The next prime is 21221300012167. The reversal of 21221300012141 is 14121000312212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20066556344041 + 1154743668100 = 4479571^2 + 1074590^2 .

It is a cyclic number.

It is not a de Polignac number, because 21221300012141 - 2²² = 21221295817837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21221300012641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610650006070 + 10610650006071.

It is an arithmetic number, because the mean of its divisors is an integer number (10610650006071).

Almost surely, 2^{21221300012141} is an apocalyptic number.

It is an amenable number.

21221300012141 is a deficient number, since it is larger than the sum of its proper divisors (1).

21221300012141 is an equidigital number, since it uses as much as digits as its factorization.

21221300012141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 21221300012141 its reverse (14121000312212), we get a palindrome (35342300324353).

The spelling of 21221300012141 in words is "twenty-one trillion, two hundred twenty-one billion, three hundred million, twelve thousand, one hundred forty-one".