1211122121262 has 8 divisors (see below), whose sum is σ = 2422244242536. Its totient is φ = 403707373752.

The previous prime is 1211122121191. The next prime is 1211122121263. The reversal of 1211122121262 is 2621212211121.

It is a sphenic number, since it is the product of 3 distinct primes.

1211122121262 is an admirable number.

It is a super-2 number, since 2×1211122121262² (a number of 25 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211122121263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100926843433 + ... + 100926843444.

It is an arithmetic number, because the mean of its divisors is an integer number (302780530317).

Almost surely, 2^{1211122121262} is an apocalyptic number.

1211122121262 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1211122121262 is a wasteful number, since it uses less digits than its factorization.

1211122121262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201853686882.

The product of its digits is 384, while the sum is 24.

Adding to 1211122121262 its reverse (2621212211121), we get a palindrome (3832334332383).

The spelling of 1211122121262 in words is "one trillion, two hundred eleven billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred sixty-two".