145121551105 has 16 divisors (see below), whose sum is σ = 176140056960. Its totient is φ = 114770483712.

The previous prime is 145121551097. The next prime is 145121551117. The reversal of 145121551105 is 501155121541.

It is a cyclic number.

It is not a de Polignac number, because 145121551105 - 2³ = 145121551097 is a prime.

It is a super-2 number, since 2×145121551105² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261526 + ... + 598864.

It is an arithmetic number, because the mean of its divisors is an integer number (11008753560).

Almost surely, 2^145121551105 is an apocalyptic number.

It is an amenable number.

145121551105 is a deficient number, since it is larger than the sum of its proper divisors (31018505855).

145121551105 is an equidigital number, since it uses as much as digits as its factorization.

145121551105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338328.

The product of its (nonzero) digits is 5000, while the sum is 31.

Adding to 145121551105 its reverse (501155121541), we get a palindrome (646276672646).

The spelling of 145121551105 in words is "one hundred forty-five billion, one hundred twenty-one million, five hundred fifty-one thousand, one hundred five".