121525053111 has 64 divisors (see below), whose sum is σ = 224707046400. Its totient is φ = 63060940800.

The previous prime is 121525053107. The next prime is 121525053173. The reversal of 121525053111 is 111350525121.

It is a happy number.

121525053111 is a `hidden beast` number, since 1 + 2 + 152 + 505 + 3 + 1 + 1 + 1 = 666.

It is not a de Polignac number, because 121525053111 - 2² = 121525053107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121525053211) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1899931 + ... + 1962851.

It is an arithmetic number, because the mean of its divisors is an integer number (3511047600).

Almost surely, 2^121525053111 is an apocalyptic number.

121525053111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121525053111 is a deficient number, since it is larger than the sum of its proper divisors (103181993289).

121525053111 is a wasteful number, since it uses less digits than its factorization.

121525053111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63877 (or 63871 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 27.

Adding to 121525053111 its reverse (111350525121), we get a palindrome (232875578232).

The spelling of 121525053111 in words is "one hundred twenty-one billion, five hundred twenty-five million, fifty-three thousand, one hundred eleven".