73901121122221 has 4 divisors (see below), whose sum is σ = 73913423628832. Its totient is φ = 73888818615612.

The previous prime is 73901121122099. The next prime is 73901121122281. The reversal of 73901121122221 is 12222112110937.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 73901121122221 - 2⁷ = 73901121122093 is a prime.

It is a super-2 number, since 2×73901121122221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73901121122281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6151244295 + ... + 6151256308.

It is an arithmetic number, because the mean of its divisors is an integer number (18478355907208).

Almost surely, 2^{73901121122221} is an apocalyptic number.

It is an amenable number.

73901121122221 is a deficient number, since it is larger than the sum of its proper divisors (12302506611).

73901121122221 is a wasteful number, since it uses less digits than its factorization.

73901121122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12302506610.

The product of its (nonzero) digits is 6048, while the sum is 34.

The spelling of 73901121122221 in words is "seventy-three trillion, nine hundred one billion, one hundred twenty-one million, one hundred twenty-two thousand, two hundred twenty-one".