121021102021 has 8 divisors (see below), whose sum is σ = 127316181600. Its totient is φ = 114867485040.

The previous prime is 121021102003. The next prime is 121021102043. The reversal of 121021102021 is 120201120121.

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

It is not a de Polignac number, because 121021102021 - 2⁷ = 121021101893 is a prime.

It is a super-2 number, since 2×121021102021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121021101992 and 121021102010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121021102051) 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, 35363895 + ... + 35367316.

It is an arithmetic number, because the mean of its divisors is an integer number (15914522700).

Almost surely, 2^121021102021 is an apocalyptic number.

It is an amenable number.

121021102021 is a deficient number, since it is larger than the sum of its proper divisors (6295079579).

121021102021 is an equidigital number, since it uses as much as digits as its factorization.

121021102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70731299.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121021102021 its reverse (120201120121), we get a palindrome (241222222142).

The spelling of 121021102021 in words is "one hundred twenty-one billion, twenty-one million, one hundred two thousand, twenty-one".