121101011101020 has 96 divisors (see below), whose sum is σ = 339674457927168. Its totient is φ = 32237302309632.

The previous prime is 121101011101019. The next prime is 121101011101093. The reversal of 121101011101020 is 20101110101121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 121101011100987 and 121101011101005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86030097 + ... + 87426423.

It is an arithmetic number, because the mean of its divisors is an integer number (3538275603408).

Almost surely, 2^{121101011101020} is an apocalyptic number.

121101011101020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121101011101020 is an abundant number, since it is smaller than the sum of its proper divisors (218573446826148).

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

121101011101020 is a wasteful number, since it uses less digits than its factorization.

121101011101020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398859 (or 1398857 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 121101011101020 its reverse (20101110101121), we get a palindrome (141202121202141).

The spelling of 121101011101020 in words is "one hundred twenty-one trillion, one hundred one billion, eleven million, one hundred one thousand, twenty".