121110002021 has 4 divisors (see below), whose sum is σ = 121145552832. Its totient is φ = 121074451212.

The previous prime is 121110002017. The next prime is 121110002077. The reversal of 121110002021 is 120200011121.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120200011121 = 929 ⋅129386449.

It is a cyclic number.

It is not a de Polignac number, because 121110002021 - 2² = 121110002017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121110001993 and 121110002011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121110002621) 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, 17770295 + ... + 17777108.

It is an arithmetic number, because the mean of its divisors is an integer number (30286388208).

Almost surely, 2^121110002021 is an apocalyptic number.

It is an amenable number.

121110002021 is a deficient number, since it is larger than the sum of its proper divisors (35550811).

121110002021 is an equidigital number, since it uses as much as digits as its factorization.

121110002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35550810.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121110002021 its reverse (120200011121), we get a palindrome (241310013142).

The spelling of 121110002021 in words is "one hundred twenty-one billion, one hundred ten million, two thousand, twenty-one".