121012221202220 has 48 divisors (see below), whose sum is σ = 254573622340128. Its totient is φ = 48319637245440.

The previous prime is 121012221202189. The next prime is 121012221202231. The reversal of 121012221202220 is 22202122210121.

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 = 121012221202192 and 121012221202201.

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, 23842352 + ... + 28468968.

It is an arithmetic number, because the mean of its divisors is an integer number (5303617132086).

Almost surely, 2^{121012221202220} is an apocalyptic number.

121012221202220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121012221202220 is an abundant number, since it is smaller than the sum of its proper divisors (133561401137908).

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

121012221202220 is a wasteful number, since it uses less digits than its factorization.

121012221202220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4628930 (or 4628928 counting only the distinct ones).

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

Adding to 121012221202220 its reverse (22202122210121), we get a palindrome (143214343412341).

The spelling of 121012221202220 in words is "one hundred twenty-one trillion, twelve billion, two hundred twenty-one million, two hundred two thousand, two hundred twenty".