121517200150 has 48 divisors (see below), whose sum is σ = 231692701968. Its totient is φ = 47388992000.

The previous prime is 121517200141. The next prime is 121517200159. The reversal of 121517200150 is 51002715121.

It is an interprime number because it is at equal distance from previous prime (121517200141) and next prime (121517200159).

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121517200159) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3102690 + ... + 3141610.

It is an arithmetic number, because the mean of its divisors is an integer number (4826931291).

Almost surely, 2^121517200150 is an apocalyptic number.

121517200150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121517200150 is a deficient number, since it is larger than the sum of its proper divisors (110175501818).

121517200150 is a wasteful number, since it uses less digits than its factorization.

121517200150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40497 (or 40492 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 25.

Adding to 121517200150 its reverse (51002715121), we get a palindrome (172519915271).

The spelling of 121517200150 in words is "one hundred twenty-one billion, five hundred seventeen million, two hundred thousand, one hundred fifty".