121002111020020 has 24 divisors (see below), whose sum is σ = 254836722589344. Its totient is φ = 48261360703776.

The previous prime is 121002111019963. The next prime is 121002111020029. The reversal of 121002111020020 is 20020111200121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121002111020029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8717724402 + ... + 8717738281.

It is an arithmetic number, because the mean of its divisors is an integer number (10618196774556).

Almost surely, 2^{121002111020020} is an apocalyptic number.

121002111020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121002111020020 is an abundant number, since it is smaller than the sum of its proper divisors (133834611569324).

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

121002111020020 is a wasteful number, since it uses less digits than its factorization.

121002111020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17435463039 (or 17435463037 counting only the distinct ones).

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

Adding to 121002111020020 its reverse (20020111200121), we get a palindrome (141022222220141).

The spelling of 121002111020020 in words is "one hundred twenty-one trillion, two billion, one hundred eleven million, twenty thousand, twenty".