121293697821 has 8 divisors (see below), whose sum is σ = 163392198144. Its totient is φ = 80028831360.

The previous prime is 121293697781. The next prime is 121293697829. The reversal of 121293697821 is 128796392121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121293697821 - 2⁶ = 121293697757 is a prime.

It is a super-2 number, since 2×121293697821² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121293697829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208408125 + ... + 208408706.

It is an arithmetic number, because the mean of its divisors is an integer number (20424024768).

Almost surely, 2^121293697821 is an apocalyptic number.

It is an amenable number.

121293697821 is a deficient number, since it is larger than the sum of its proper divisors (42098500323).

121293697821 is an equidigital number, since it uses as much as digits as its factorization.

121293697821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416816931.

The product of its digits is 653184, while the sum is 51.

The spelling of 121293697821 in words is "one hundred twenty-one billion, two hundred ninety-three million, six hundred ninety-seven thousand, eight hundred twenty-one".