1210102001001 has 12 divisors (see below), whose sum is σ = 1748254792128. Its totient is φ = 806582507544.

The previous prime is 1210102000963. The next prime is 1210102001011. The reversal of 1210102001001 is 1001002010121.

It is a happy number.

It is not a de Polignac number, because 1210102001001 - 2⁶ = 1210102000937 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1210102001011) 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, 12629605 + ... + 12725058.

It is an arithmetic number, because the mean of its divisors is an integer number (145687899344).

Almost surely, 2^{1210102001001} is an apocalyptic number.

It is an amenable number.

1210102001001 is a deficient number, since it is larger than the sum of its proper divisors (538152791127).

1210102001001 is a wasteful number, since it uses less digits than its factorization.

1210102001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25359972 (or 25359969 counting only the distinct ones).

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

Adding to 1210102001001 its reverse (1001002010121), we get a palindrome (2211104011122).

The spelling of 1210102001001 in words is "one trillion, two hundred ten billion, one hundred two million, one thousand, one".