1210211210042 has 16 divisors (see below), whose sum is σ = 1857066616680. Its totient is φ = 591341098752.

The previous prime is 1210211210041. The next prime is 1210211210059. The reversal of 1210211210042 is 2400121120121.

It can be written as a sum of positive squares in 4 ways, for example, as 981726254041 + 228484956001 = 990821^2 + 478001^2 .

It is a super-2 number, since 2×1210211210042² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1210211210042.

It is not an unprimeable number, because it can be changed into a prime (1210211210041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38007563 + ... + 38039390.

Almost surely, 2^{1210211210042} is an apocalyptic number.

1210211210042 is a deficient number, since it is larger than the sum of its proper divisors (646855406638).

1210211210042 is a wasteful number, since it uses less digits than its factorization.

1210211210042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76047137.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1210211210042 its reverse (2400121120121), we get a palindrome (3610332330163).

The spelling of 1210211210042 in words is "one trillion, two hundred ten billion, two hundred eleven million, two hundred ten thousand, forty-two".