1210211021210 has 16 divisors (see below), whose sum is σ = 2179387919592. Its totient is φ = 483860390400.

The previous prime is 1210211021209. The next prime is 1210211021219. The reversal of 1210211021210 is 121201120121.

It can be written as a sum of positive squares in 4 ways, for example, as 1206634143961 + 3576877249 = 1098469^2 + 59807^2 .

It is a super-2 number, since 2×1210211021210² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1210211021219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27979571 + ... + 28022790.

Almost surely, 2^{1210211021210} is an apocalyptic number.

1210211021210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1210211021210 is a deficient number, since it is larger than the sum of its proper divisors (969176898382).

1210211021210 is a wasteful number, since it uses less digits than its factorization.

1210211021210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56004529.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1210211021210 its reverse (121201120121), we get a palindrome (1331412141331).

The spelling of 1210211021210 in words is "one trillion, two hundred ten billion, two hundred eleven million, twenty-one thousand, two hundred ten".