121222202121020 has 192 divisors, whose sum is σ = 343892663202816. Its totient is φ = 34663146117120.

The previous prime is 121222202121011. The next prime is 121222202121029. The reversal of 121222202121020 is 20121202222121.

It is an interprime number because it is at equal distance from previous prime (121222202121011) and next prime (121222202121029).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 121222202120983 and 121222202121001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121222202121029) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15310529 + ... + 21837048.

It is an arithmetic number, because the mean of its divisors is an integer number (1791107620848).

Almost surely, 2^{121222202121020} is an apocalyptic number.

121222202121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121222202121020 is an abundant number, since it is smaller than the sum of its proper divisors (222670461081796).

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

121222202121020 is a wasteful number, since it uses less digits than its factorization.

121222202121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37147780 (or 37147778 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 121222202121020 its reverse (20121202222121), we get a palindrome (141343404343141).

The spelling of 121222202121020 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, two hundred two million, one hundred twenty-one thousand, twenty".