121021110221001 has 4 divisors (see below), whose sum is σ = 161361480294672. Its totient is φ = 80680740147332.

The previous prime is 121021110220981. The next prime is 121021110221017. The reversal of 121021110221001 is 100122011120121.

It is a happy number.

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 121021110221001 - 2⁶ = 121021110220937 is a prime.

It is a super-2 number, since 2×121021110221001² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121021110221021) 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, 20170185036831 + ... + 20170185036836.

It is an arithmetic number, because the mean of its divisors is an integer number (40340370073668).

Almost surely, 2^{121021110221001} is an apocalyptic number.

It is an amenable number.

121021110221001 is a deficient number, since it is larger than the sum of its proper divisors (40340370073671).

121021110221001 is an equidigital number, since it uses as much as digits as its factorization.

121021110221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40340370073670.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121021110221001 its reverse (100122011120121), we get a palindrome (221143121341122).

The spelling of 121021110221001 in words is "one hundred twenty-one trillion, twenty-one billion, one hundred ten million, two hundred twenty-one thousand, one".