1211022012210 has 64 divisors (see below), whose sum is σ = 2936546870400. Its totient is φ = 319602350592.

The previous prime is 1211022012191. The next prime is 1211022012247. The reversal of 1211022012210 is 122102201121.

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 1211022012210.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2586321 + ... + 3018459.

It is an arithmetic number, because the mean of its divisors is an integer number (45883544850).

Almost surely, 2^{1211022012210} is an apocalyptic number.

1211022012210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211022012210 is an abundant number, since it is smaller than the sum of its proper divisors (1725524858190).

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

1211022012210 is a wasteful number, since it uses less digits than its factorization.

1211022012210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433115.

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

Adding to 1211022012210 its reverse (122102201121), we get a palindrome (1333124213331).

It can be divided in two parts, 121102 and 2012210, that added together give a palindrome (2133312).

The spelling of 1211022012210 in words is "one trillion, two hundred eleven billion, twenty-two million, twelve thousand, two hundred ten".