121958011 has 12 divisors (see below), whose sum is σ = 142203600. Its totient is φ = 104289360.

The previous prime is 121958009. The next prime is 121958047. The reversal of 121958011 is 110859121.

It is not a de Polignac number, because 121958011 - 2¹ = 121958009 is a prime.

It is a super-2 number, since 2×121958011² = 29747512894152242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121958411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19890 + ... + 25288.

It is an arithmetic number, because the mean of its divisors is an integer number (11850300).

Almost surely, 2^121958011 is an apocalyptic number.

121958011 is a deficient number, since it is larger than the sum of its proper divisors (20245589).

121958011 is an equidigital number, since it uses as much as digits as its factorization.

121958011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5874 (or 5867 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 28.

The square root of 121958011 is about 11043.4601008923. The cubic root of 121958011 is about 495.9106604505.

The spelling of 121958011 in words is "one hundred twenty-one million, nine hundred fifty-eight thousand, eleven".