1211233101210 has 128 divisors (see below), whose sum is σ = 3709039334400. Its totient is φ = 278177924160.

The previous prime is 1211233101173. The next prime is 1211233101241. The reversal of 1211233101210 is 121013321121.

1211233101210 is a `hidden beast` number, since 1 + 21 + 123 + 310 + 1 + 210 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10675744 + ... + 10788603.

It is an arithmetic number, because the mean of its divisors is an integer number (28976869800).

Almost surely, 2^{1211233101210} is an apocalyptic number.

1211233101210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211233101210 is an abundant number, since it is smaller than the sum of its proper divisors (2497806233190).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211233101210 is a wasteful number, since it uses less digits than its factorization.

1211233101210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21464393 (or 21464387 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1211233101210 its reverse (121013321121), we get a palindrome (1332246422331).

The spelling of 1211233101210 in words is "one trillion, two hundred eleven billion, two hundred thirty-three million, one hundred one thousand, two hundred ten".