121022212021121 has 4 divisors (see below), whose sum is σ = 121103598849792. Its totient is φ = 120940825192452.

The previous prime is 121022212021111. The next prime is 121022212021127. The reversal of 121022212021121 is 121120212220121.

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 a de Polignac number, because none of the positive numbers 2^k-121022212021121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121022212021093 and 121022212021102.

It is not an unprimeable number, because it can be changed into a prime (121022212021127) 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, 40693412105 + ... + 40693415078.

It is an arithmetic number, because the mean of its divisors is an integer number (30275899712448).

Almost surely, 2^{121022212021121} is an apocalyptic number.

It is an amenable number.

121022212021121 is a deficient number, since it is larger than the sum of its proper divisors (81386828671).

121022212021121 is an equidigital number, since it uses as much as digits as its factorization.

121022212021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81386828670.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 121022212021121 its reverse (121120212220121), we get a palindrome (242142424241242).

The spelling of 121022212021121 in words is "one hundred twenty-one trillion, twenty-two billion, two hundred twelve million, twenty-one thousand, one hundred twenty-one".