121021022021020 has 48 divisors (see below), whose sum is σ = 286808440917600. Its totient is φ = 42490139390720.

The previous prime is 121021022020961. The next prime is 121021022021041. The reversal of 121021022021020 is 20120220120121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121021022020985 and 121021022021003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9484399735 + ... + 9484412494.

It is an arithmetic number, because the mean of its divisors is an integer number (5975175852450).

Almost surely, 2^{121021022021020} is an apocalyptic number.

121021022021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121021022021020 is an abundant number, since it is smaller than the sum of its proper divisors (165787418896580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121021022021020 is a wasteful number, since it uses less digits than its factorization.

121021022021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18968812278 (or 18968812276 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121021022021020 its reverse (20120220120121), we get a palindrome (141141242141141).

The spelling of 121021022021020 in words is "one hundred twenty-one trillion, twenty-one billion, twenty-two million, twenty-one thousand, twenty".