221121100122122 has 4 divisors (see below), whose sum is σ = 331681650183186. Its totient is φ = 110560550061060.

The previous prime is 221121100122119. The next prime is 221121100122157. The reversal of 221121100122122 is 221221001121122.

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., 218384289064561 + 2736811057561 = 14777831^2 + 1654331^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221121100122094 and 221121100122103.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55280275030529 + ... + 55280275030532.

Almost surely, 2^{221121100122122} is an apocalyptic number.

221121100122122 is a deficient number, since it is larger than the sum of its proper divisors (110560550061064).

221121100122122 is a wasteful number, since it uses less digits than its factorization.

221121100122122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110560550061063.

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

Adding to 221121100122122 its reverse (221221001121122), we get a palindrome (442342101243244).

The spelling of 221121100122122 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, one hundred million, one hundred twenty-two thousand, one hundred twenty-two".