121216021495 has 16 divisors (see below), whose sum is σ = 153253923840. Its totient is φ = 91785615264.

The previous prime is 121216021483. The next prime is 121216021523. The reversal of 121216021495 is 594120612121.

It is not a de Polignac number, because 121216021495 - 2¹⁵ = 121215988727 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121216021495.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 473619 + ... + 683188.

It is an arithmetic number, because the mean of its divisors is an integer number (9578370240).

Almost surely, 2^121216021495 is an apocalyptic number.

121216021495 is a deficient number, since it is larger than the sum of its proper divisors (32037902345).

121216021495 is a wasteful number, since it uses less digits than its factorization.

121216021495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157934.

The product of its (nonzero) digits is 8640, while the sum is 34.

The spelling of 121216021495 in words is "one hundred twenty-one billion, two hundred sixteen million, twenty-one thousand, four hundred ninety-five".