1210001010121 has 12 divisors (see below), whose sum is σ = 1248102452736. Its totient is φ = 1172530533200.

The previous prime is 1210001010073. The next prime is 1210001010131. The reversal of 1210001010121 is 1210101000121.

It is a de Polignac number, because none of the positive numbers 2^k-1210001010121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1210001010098 and 1210001010107.

It is not an unprimeable number, because it can be changed into a prime (1210001010131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 782425 + ... + 1741318.

It is an arithmetic number, because the mean of its divisors is an integer number (104008537728).

Almost surely, 2^{1210001010121} is an apocalyptic number.

It is an amenable number.

1210001010121 is a deficient number, since it is larger than the sum of its proper divisors (38101442615).

1210001010121 is an equidigital number, since it uses as much as digits as its factorization.

1210001010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2523992 (or 2523891 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1210001010121 its reverse (1210101000121), we get a palindrome (2420102010242).

The spelling of 1210001010121 in words is "one trillion, two hundred ten billion, one million, ten thousand, one hundred twenty-one".