136002111761221 has 2 divisors, whose sum is σ = 136002111761222. Its totient is φ = 136002111761220.

The previous prime is 136002111761167. The next prime is 136002111761251. The reversal of 136002111761221 is 122167111200631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134325527032321 + 1676584728900 = 11589889^2 + 1294830^2 .

It is a cyclic number.

It is not a de Polignac number, because 136002111761221 - 2¹⁵ = 136002111728453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136002111761251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68001055880610 + 68001055880611.

It is an arithmetic number, because the mean of its divisors is an integer number (68001055880611).

Almost surely, 2^{136002111761221} is an apocalyptic number.

It is an amenable number.

136002111761221 is a deficient number, since it is larger than the sum of its proper divisors (1).

136002111761221 is an equidigital number, since it uses as much as digits as its factorization.

136002111761221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 34.

Adding to 136002111761221 its reverse (122167111200631), we get a palindrome (258169222961852).

The spelling of 136002111761221 in words is "one hundred thirty-six trillion, two billion, one hundred eleven million, seven hundred sixty-one thousand, two hundred twenty-one".