11211220121102 has 4 divisors (see below), whose sum is σ = 16816830181656. Its totient is φ = 5605610060550.

The previous prime is 11211220121071. The next prime is 11211220121131. The reversal of 11211220121102 is 20112102211211.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2802805030274 + ... + 2802805030277.

It is an arithmetic number, because the mean of its divisors is an integer number (4204207545414).

Almost surely, 2^{11211220121102} is an apocalyptic number.

11211220121102 is a deficient number, since it is larger than the sum of its proper divisors (5605610060554).

11211220121102 is an equidigital number, since it uses as much as digits as its factorization.

11211220121102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5605610060553.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11211220121102 its reverse (20112102211211), we get a palindrome (31323322332313).

The spelling of 11211220121102 in words is "eleven trillion, two hundred eleven billion, two hundred twenty million, one hundred twenty-one thousand, one hundred two".