221211101022122 has 4 divisors (see below), whose sum is σ = 331816651533186. Its totient is φ = 110605550511060.

The previous prime is 221211101022113. The next prime is 221211101022173. The reversal of 221211101022122 is 221220101112122.

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

It can be written as a sum of positive squares in only one way, i.e., 155332376224081 + 65878724798041 = 12463241^2 + 8116571^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221211101022094 and 221211101022103.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55302775255529 + ... + 55302775255532.

Almost surely, 2^{221211101022122} is an apocalyptic number.

221211101022122 is a deficient number, since it is larger than the sum of its proper divisors (110605550511064).

221211101022122 is a wasteful number, since it uses less digits than its factorization.

221211101022122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110605550511063.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 221211101022122 its reverse (221220101112122), we get a palindrome (442431202134244).

The spelling of 221211101022122 in words is "two hundred twenty-one trillion, two hundred eleven billion, one hundred one million, twenty-two thousand, one hundred twenty-two".