21061234151 has 2 divisors, whose sum is σ = 21061234152. Its totient is φ = 21061234150.

The previous prime is 21061234141. The next prime is 21061234213. The reversal of 21061234151 is 15143216012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21061234151 - 2⁶ = 21061234087 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21061234151.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21061234121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10530617075 + 10530617076.

It is an arithmetic number, because the mean of its divisors is an integer number (10530617076).

Almost surely, 2^21061234151 is an apocalyptic number.

21061234151 is a deficient number, since it is larger than the sum of its proper divisors (1).

21061234151 is an equidigital number, since it uses as much as digits as its factorization.

21061234151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 26.

The spelling of 21061234151 in words is "twenty-one billion, sixty-one million, two hundred thirty-four thousand, one hundred fifty-one".