33550551121 has 2 divisors, whose sum is σ = 33550551122. Its totient is φ = 33550551120.

The previous prime is 33550551107. The next prime is 33550551149. The reversal of 33550551121 is 12115505533.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30602604096 + 2947947025 = 174936^2 + 54295^2 .

It is a cyclic number.

It is not a de Polignac number, because 33550551121 - 2¹¹ = 33550549073 is a prime.

It is a super-2 number, since 2×33550551121² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (33550551821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16775275560 + 16775275561.

It is an arithmetic number, because the mean of its divisors is an integer number (16775275561).

Almost surely, 2^33550551121 is an apocalyptic number.

It is an amenable number.

33550551121 is a deficient number, since it is larger than the sum of its proper divisors (1).

33550551121 is an equidigital number, since it uses as much as digits as its factorization.

33550551121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11250, while the sum is 31.

The spelling of 33550551121 in words is "thirty-three billion, five hundred fifty million, five hundred fifty-one thousand, one hundred twenty-one".