1211011120210 has 16 divisors (see below), whose sum is σ = 2179841354136. Its totient is φ = 484399706368.

The previous prime is 1211011120181. The next prime is 1211011120217. The reversal of 1211011120210 is 120211101121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1119048738201 + 91962382009 = 1057851^2 + 303253^2 .

It is not an unprimeable number, because it can be changed into a prime (1211011120217) 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, 592872 + ... + 1665388.

Almost surely, 2^{1211011120210} is an apocalyptic number.

1211011120210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211011120210 is a deficient number, since it is larger than the sum of its proper divisors (968830233926).

1211011120210 is a wasteful number, since it uses less digits than its factorization.

1211011120210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185437.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1211011120210 its reverse (120211101121), we get a palindrome (1331222221331).

The spelling of 1211011120210 in words is "one trillion, two hundred eleven billion, eleven million, one hundred twenty thousand, two hundred ten".