1210101120121 has 4 divisors (see below), whose sum is σ = 1235847952512. Its totient is φ = 1184354287732.

The previous prime is 1210101120113. The next prime is 1210101120131. The reversal of 1210101120121 is 1210211010121.

It is a happy number.

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 1210101120121 - 2³ = 1210101120113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1210101120101) 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, 12873416125 + ... + 12873416218.

It is an arithmetic number, because the mean of its divisors is an integer number (308961988128).

Almost surely, 2^{1210101120121} is an apocalyptic number.

It is an amenable number.

1210101120121 is a deficient number, since it is larger than the sum of its proper divisors (25746832391).

1210101120121 is an equidigital number, since it uses as much as digits as its factorization.

1210101120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25746832390.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1210101120121 its reverse (1210211010121), we get a palindrome (2420312130242).

The spelling of 1210101120121 in words is "one trillion, two hundred ten billion, one hundred one million, one hundred twenty thousand, one hundred twenty-one".