150781411997221 has 2 divisors, whose sum is σ = 150781411997222. Its totient is φ = 150781411997220.

The previous prime is 150781411997207. The next prime is 150781411997243. The reversal of 150781411997221 is 122799114187051.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88836468596100 + 61944943401121 = 9425310^2 + 7870511^2 .

It is an emirp because it is prime and its reverse (122799114187051) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 150781411997221 - 2¹¹ = 150781411995173 is a prime.

It is a super-2 number, since 2×150781411997221² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (150781411997291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75390705998610 + 75390705998611.

It is an arithmetic number, because the mean of its divisors is an integer number (75390705998611).

Almost surely, 2^{150781411997221} is an apocalyptic number.

It is an amenable number.

150781411997221 is a deficient number, since it is larger than the sum of its proper divisors (1).

150781411997221 is an equidigital number, since it uses as much as digits as its factorization.

150781411997221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2540160, while the sum is 58.

The spelling of 150781411997221 in words is "one hundred fifty trillion, seven hundred eighty-one billion, four hundred eleven million, nine hundred ninety-seven thousand, two hundred twenty-one".