1210142105021 has 16 divisors (see below), whose sum is σ = 1231654080000. Its totient is φ = 1188735509808.

The previous prime is 1210142105009. The next prime is 1210142105057. The reversal of 1210142105021 is 1205012410121.

It is a cyclic number.

It is not a de Polignac number, because 1210142105021 - 2²⁶ = 1210074996157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1210142104984 and 1210142105002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210142105621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43549310 + ... + 43577088.

It is an arithmetic number, because the mean of its divisors is an integer number (76978380000).

Almost surely, 2^{1210142105021} is an apocalyptic number.

It is an amenable number.

1210142105021 is a deficient number, since it is larger than the sum of its proper divisors (21511974979).

1210142105021 is a wasteful number, since it uses less digits than its factorization.

1210142105021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29648.

The product of its (nonzero) digits is 160, while the sum is 20.

Adding to 1210142105021 its reverse (1205012410121), we get a palindrome (2415154515142).

The spelling of 1210142105021 in words is "one trillion, two hundred ten billion, one hundred forty-two million, one hundred five thousand, twenty-one".