2101221211122 has 24 divisors (see below), whose sum is σ = 4966522863120. Its totient is φ = 636733700280.

The previous prime is 2101221211097. The next prime is 2101221211129. The reversal of 2101221211122 is 2211121221012.

2101221211122 is a `hidden beast` number, since 210 + 1 + 221 + 211 + 1 + 22 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 2101221211095 and 2101221211104.

It is not an unprimeable number, because it can be changed into a prime (2101221211129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5306113972 + ... + 5306114367.

It is an arithmetic number, because the mean of its divisors is an integer number (206938452630).

Almost surely, 2^{2101221211122} is an apocalyptic number.

2101221211122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2101221211122 is an abundant number, since it is smaller than the sum of its proper divisors (2865301651998).

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

2101221211122 is a wasteful number, since it uses less digits than its factorization.

2101221211122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10612228358 (or 10612228355 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 2101221211122 its reverse (2211121221012), we get a palindrome (4312342432134).

The spelling of 2101221211122 in words is "two trillion, one hundred one billion, two hundred twenty-one million, two hundred eleven thousand, one hundred twenty-two".