121011021012220 has 96 divisors (see below), whose sum is σ = 271025251741440. Its totient is φ = 45226350597120.

The previous prime is 121011021012199. The next prime is 121011021012221. The reversal of 121011021012220 is 22210120110121.

It is a junction number, because it is equal to n+sod(n) for n = 121011021012194 and 121011021012203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121011021012221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 793277355 + ... + 793429885.

It is an arithmetic number, because the mean of its divisors is an integer number (2823179705640).

Almost surely, 2^{121011021012220} is an apocalyptic number.

121011021012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121011021012220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135512625870720).

121011021012220 is an abundant number, since it is smaller than the sum of its proper divisors (150014230729220).

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

121011021012220 is a wasteful number, since it uses less digits than its factorization.

121011021012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169483 (or 169481 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121011021012220 its reverse (22210120110121), we get a palindrome (143221141122341).

The spelling of 121011021012220 in words is "one hundred twenty-one trillion, eleven billion, twenty-one million, twelve thousand, two hundred twenty".