1210000120101 has 32 divisors (see below), whose sum is σ = 1899211478400. Its totient is φ = 758746932480.

The previous prime is 1210000120099. The next prime is 1210000120157. The reversal of 1210000120101 is 1010210000121.

It is a happy number.

It is not a de Polignac number, because 1210000120101 - 2¹ = 1210000120099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210000120601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69091 + ... + 1557168.

It is an arithmetic number, because the mean of its divisors is an integer number (59350358700).

Almost surely, 2^{1210000120101} is an apocalyptic number.

It is an amenable number.

1210000120101 is a deficient number, since it is larger than the sum of its proper divisors (689211358299).

1210000120101 is a wasteful number, since it uses less digits than its factorization.

1210000120101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1627906 (or 1627900 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1210000120101 its reverse (1010210000121), we get a palindrome (2220210120222).

The spelling of 1210000120101 in words is "one trillion, two hundred ten billion, one hundred twenty thousand, one hundred one".