121201212020020 has 24 divisors (see below), whose sum is σ = 277660958446368. Its totient is φ = 44073168007200.

The previous prime is 121201212019931. The next prime is 121201212020039. The reversal of 121201212020020 is 20020212102121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121201212019976 and 121201212020003.

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, 275457299826 + ... + 275457300265.

It is an arithmetic number, because the mean of its divisors is an integer number (11569206601932).

Almost surely, 2^{121201212020020} is an apocalyptic number.

121201212020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121201212020020 is an abundant number, since it is smaller than the sum of its proper divisors (156459746426348).

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

121201212020020 is a wasteful number, since it uses less digits than its factorization.

121201212020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550914600111 (or 550914600109 counting only the distinct ones).

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

Adding to 121201212020020 its reverse (20020212102121), we get a palindrome (141221424122141).

The spelling of 121201212020020 in words is "one hundred twenty-one trillion, two hundred one billion, two hundred twelve million, twenty thousand, twenty".