919702098121 has 9 divisors (see below), whose sum is σ = 924726674599. Its totient is φ = 914704691800.

The previous prime is 919702098101. The next prime is 919702098143. The reversal of 919702098121 is 121890207919.

It is a happy number.

The square root of 919702098121 is 959011.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 833183758521 + 86518339600 = 912789^2 + 294140^2 .

It is not a de Polignac number, because 919702098121 - 2³³ = 911112163529 is a prime.

It is a super-3 number, since 3×919702098121³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (919702098101) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 183168591 + ... + 183173611.

Almost surely, 2^919702098121 is an apocalyptic number.

919702098121 is the 959011-st square number.

919702098121 is the 479506-th centered octagonal number.

It is an amenable number.

919702098121 is a deficient number, since it is larger than the sum of its proper divisors (5024576478).

919702098121 is an frugal number, since it uses more digits than its factorization.

919702098121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10424 (or 5212 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 49.

Multiplying 919702098121 by its sum of digits (49), we get a square (45065402807929 = 6713077²).

The spelling of 919702098121 in words is "nine hundred nineteen billion, seven hundred two million, ninety-eight thousand, one hundred twenty-one".