121121011002021 has 8 divisors (see below), whose sum is σ = 161495044640640. Its totient is φ = 80747159015712.

The previous prime is 121121011002007. The next prime is 121121011002049. The reversal of 121121011002021 is 120200110121121.

It is a happy number.

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

It is not a de Polignac number, because 121121011002021 - 2⁵ = 121121011001989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121121011000021) 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, 43849581 + ... + 46529858.

It is an arithmetic number, because the mean of its divisors is an integer number (20186880580080).

Almost surely, 2^{121121011002021} is an apocalyptic number.

It is an amenable number.

121121011002021 is a deficient number, since it is larger than the sum of its proper divisors (40374033638619).

121121011002021 is an equidigital number, since it uses as much as digits as its factorization.

121121011002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90826155.

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

Adding to 121121011002021 its reverse (120200110121121), we get a palindrome (241321121123142).

The spelling of 121121011002021 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, eleven million, two thousand, twenty-one".