121010215 has 4 divisors (see below), whose sum is σ = 145212264. Its totient is φ = 96808168.

The previous prime is 121010207. The next prime is 121010257. The reversal of 121010215 is 512010121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 512010121 = 7 ⋅73144303.

It is a cyclic number.

It is not a de Polignac number, because 121010215 - 2³ = 121010207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121010195 and 121010204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12101017 + ... + 12101026.

It is an arithmetic number, because the mean of its divisors is an integer number (36303066).

Almost surely, 2^121010215 is an apocalyptic number.

121010215 is a deficient number, since it is larger than the sum of its proper divisors (24202049).

121010215 is an equidigital number, since it uses as much as digits as its factorization.

121010215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24202048.

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 121010215 is about 11000.4643083826. The cubic root of 121010215 is about 494.6226624685.

Adding to 121010215 its reverse (512010121), we get a palindrome (633020336).

The spelling of 121010215 in words is "one hundred twenty-one million, ten thousand, two hundred fifteen".