1211020112210 has 48 divisors (see below), whose sum is σ = 2253376824408. Its totient is φ = 468583223040.

The previous prime is 1211020112209. The next prime is 1211020112251. The reversal of 1211020112210 is 122110201121.

It can be written as a sum of positive squares in 4 ways, for example, as 1184703810481 + 26316301729 = 1088441^2 + 162223^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23740052 + ... + 23791008.

Almost surely, 2^{1211020112210} is an apocalyptic number.

1211020112210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211020112210 is a deficient number, since it is larger than the sum of its proper divisors (1042356712198).

1211020112210 is a wasteful number, since it uses less digits than its factorization.

1211020112210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53499 (or 53468 counting only the distinct ones).

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

Adding to 1211020112210 its reverse (122110201121), we get a palindrome (1333130313331).

The spelling of 1211020112210 in words is "one trillion, two hundred eleven billion, twenty million, one hundred twelve thousand, two hundred ten".