121000212020 has 24 divisors (see below), whose sum is σ = 256567444224. Its totient is φ = 47930180256.

The previous prime is 121000211999. The next prime is 121000212029. The reversal of 121000212020 is 20212000121.

It is a happy number.

It is a super-3 number, since 3×121000212020³ (a number of 34 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121000211992 and 121000212010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121000212029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29366924 + ... + 29371043.

It is an arithmetic number, because the mean of its divisors is an integer number (10690310176).

Almost surely, 2^121000212020 is an apocalyptic number.

121000212020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121000212020 is an abundant number, since it is smaller than the sum of its proper divisors (135567232204).

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

121000212020 is a wasteful number, since it uses less digits than its factorization.

121000212020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58738079 (or 58738077 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 121000212020 its reverse (20212000121), we get a palindrome (141212212141).

The spelling of 121000212020 in words is "one hundred twenty-one billion, two hundred twelve thousand, twenty".