121501501 has 4 divisors (see below), whose sum is σ = 132547104. Its totient is φ = 110455900.

The previous prime is 121501489. The next prime is 121501507. The reversal of 121501501 is 105105121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121501501 - 2⁵ = 121501469 is a prime.

It is a super-2 number, since 2×121501501² = 29525229490506002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121501507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5522785 + ... + 5522806.

It is an arithmetic number, because the mean of its divisors is an integer number (33136776).

Almost surely, 2^121501501 is an apocalyptic number.

121501501 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121501501 is a deficient number, since it is larger than the sum of its proper divisors (11045603).

121501501 is a wasteful number, since it uses less digits than its factorization.

121501501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11045602.

The product of its (nonzero) digits is 50, while the sum is 16.

The square root of 121501501 is about 11022.7719290567. The cubic root of 121501501 is about 495.2911269113.

Adding to 121501501 its reverse (105105121), we get a palindrome (226606622).

The spelling of 121501501 in words is "one hundred twenty-one million, five hundred one thousand, five hundred one".