121012020215 has 4 divisors (see below), whose sum is σ = 145214424264. Its totient is φ = 96809616168.

The previous prime is 121012020203. The next prime is 121012020251. The reversal of 121012020215 is 512020210121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121012020215 - 2²⁴ = 120995242999 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121012020193 and 121012020202.

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, 12101202017 + ... + 12101202026.

It is an arithmetic number, because the mean of its divisors is an integer number (36303606066).

Almost surely, 2^121012020215 is an apocalyptic number.

121012020215 is a deficient number, since it is larger than the sum of its proper divisors (24202404049).

121012020215 is an equidigital number, since it uses as much as digits as its factorization.

121012020215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24202404048.

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 121012020215 its reverse (512020210121), we get a palindrome (633032230336).

The spelling of 121012020215 in words is "one hundred twenty-one billion, twelve million, twenty thousand, two hundred fifteen".