121701897489 has 16 divisors (see below), whose sum is σ = 164664376128. Its totient is φ = 79944379392.

The previous prime is 121701897487. The next prime is 121701897509. The reversal of 121701897489 is 984798107121.

It is not a de Polignac number, because 121701897489 - 2¹ = 121701897487 is a prime.

It is a super-2 number, since 2×121701897489² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121701897487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 855132 + ... + 987245.

It is an arithmetic number, because the mean of its divisors is an integer number (10291523508).

Almost surely, 2^121701897489 is an apocalyptic number.

It is an amenable number.

121701897489 is a deficient number, since it is larger than the sum of its proper divisors (42962478639).

121701897489 is a wasteful number, since it uses less digits than its factorization.

121701897489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842704.

The product of its (nonzero) digits is 2032128, while the sum is 57.

The spelling of 121701897489 in words is "one hundred twenty-one billion, seven hundred one million, eight hundred ninety-seven thousand, four hundred eighty-nine".