1012200220121 has 4 divisors (see below), whose sum is σ = 1012373577600. Its totient is φ = 1012026862644.

The previous prime is 1012200220117. The next prime is 1012200220177. The reversal of 1012200220121 is 1210220022101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1012200220121 - 2² = 1012200220117 is a prime.

It is a super-2 number, since 2×1012200220121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012200220096 and 1012200220105.

It is not an unprimeable number, because it can be changed into a prime (1012200220111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86669981 + ... + 86681658.

It is an arithmetic number, because the mean of its divisors is an integer number (253093394400).

Almost surely, 2^{1012200220121} is an apocalyptic number.

It is an amenable number.

1012200220121 is a deficient number, since it is larger than the sum of its proper divisors (173357479).

1012200220121 is an equidigital number, since it uses as much as digits as its factorization.

1012200220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173357478.

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

Adding to 1012200220121 its reverse (1210220022101), we get a palindrome (2222420242222).

It can be divided in two parts, 1012200 and 220121, that added together give a palindrome (1232321).

The spelling of 1012200220121 in words is "one trillion, twelve billion, two hundred million, two hundred twenty thousand, one hundred twenty-one".