121220002101020 has 48 divisors (see below), whose sum is σ = 276603875788800. Its totient is φ = 44454194314560.

The previous prime is 121220002101007. The next prime is 121220002101043. The reversal of 121220002101020 is 20101200022121.

It is a junction number, because it is equal to n+sod(n) for n = 121220002100986 and 121220002101004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5145149600 + ... + 5145173159.

It is an arithmetic number, because the mean of its divisors is an integer number (5762580745600).

Almost surely, 2^{121220002101020} is an apocalyptic number.

121220002101020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121220002101020 is an abundant number, since it is smaller than the sum of its proper divisors (155383873687780).

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

121220002101020 is a wasteful number, since it uses less digits than its factorization.

121220002101020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10290322818 (or 10290322816 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121220002101020 its reverse (20101200022121), we get a palindrome (141321202123141).

The spelling of 121220002101020 in words is "one hundred twenty-one trillion, two hundred twenty billion, two million, one hundred one thousand, twenty".