1211202012210 has 32 divisors (see below), whose sum is σ = 2906913769920. Its totient is φ = 322983987648.

The previous prime is 1211202012193. The next prime is 1211202012253. The reversal of 1211202012210 is 122102021121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1211202012210.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5799564 + ... + 6004776.

It is an arithmetic number, because the mean of its divisors is an integer number (90841055310).

Almost surely, 2^{1211202012210} is an apocalyptic number.

1211202012210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211202012210 is an abundant number, since it is smaller than the sum of its proper divisors (1695711757710).

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

1211202012210 is a wasteful number, since it uses less digits than its factorization.

1211202012210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401962.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1211202012210 its reverse (122102021121), we get a palindrome (1333304033331).

The spelling of 1211202012210 in words is "one trillion, two hundred eleven billion, two hundred two million, twelve thousand, two hundred ten".