121955421 has 8 divisors (see below), whose sum is σ = 185836864. Its totient is φ = 69688800.

The previous prime is 121955389. The next prime is 121955423. The reversal of 121955421 is 124559121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121955421 - 2⁵ = 121955389 is a prime.

It is a super-2 number, since 2×121955421² = 29746249422574482, 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 (121955423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2903680 + ... + 2903721.

It is an arithmetic number, because the mean of its divisors is an integer number (23229608).

Almost surely, 2^121955421 is an apocalyptic number.

It is an amenable number.

121955421 is a deficient number, since it is larger than the sum of its proper divisors (63881443).

121955421 is an equidigital number, since it uses as much as digits as its factorization.

121955421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5807411.

The product of its digits is 3600, while the sum is 30.

The square root of 121955421 is about 11043.3428362974. The cubic root of 121955421 is about 495.9071499043.

The spelling of 121955421 in words is "one hundred twenty-one million, nine hundred fifty-five thousand, four hundred twenty-one".