220121012012121 has 64 divisors (see below), whose sum is σ = 359981549568000. Its totient is φ = 131822210298240.

The previous prime is 220121012012087. The next prime is 220121012012137. The reversal of 220121012012121 is 121210210121022.

220121012012121 is a `hidden beast` number, since 2 + 201 + 210 + 120 + 12 + 121 = 666.

It is not a de Polignac number, because 220121012012121 - 2¹³ = 220121012003929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220121012012094 and 220121012012103.

It is not an unprimeable number, because it can be changed into a prime (220121012012191) 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, 38087640 + ... + 43484598.

It is an arithmetic number, because the mean of its divisors is an integer number (5624711712000).

Almost surely, 2^{220121012012121} is an apocalyptic number.

It is an amenable number.

220121012012121 is a deficient number, since it is larger than the sum of its proper divisors (139860537555879).

220121012012121 is a wasteful number, since it uses less digits than its factorization.

220121012012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5398611 (or 5398605 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 220121012012121 its reverse (121210210121022), we get a palindrome (341331222133143).

The spelling of 220121012012121 in words is "two hundred twenty trillion, one hundred twenty-one billion, twelve million, twelve thousand, one hundred twenty-one".