121101212020 has 24 divisors (see below), whose sum is σ = 254478718368. Its totient is φ = 48408832800.

The previous prime is 121101212009. The next prime is 121101212119. The reversal of 121101212020 is 20212101121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1946866 + ... + 2008105.

It is an arithmetic number, because the mean of its divisors is an integer number (10603279932).

Almost surely, 2^121101212020 is an apocalyptic number.

121101212020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121101212020 is an abundant number, since it is smaller than the sum of its proper divisors (133377506348).

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

121101212020 is a wasteful number, since it uses less digits than its factorization.

121101212020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3956511 (or 3956509 counting only the distinct ones).

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

Adding to 121101212020 its reverse (20212101121), we get a palindrome (141313313141).

The spelling of 121101212020 in words is "one hundred twenty-one billion, one hundred one million, two hundred twelve thousand, twenty".