211121110020122 has 4 divisors (see below), whose sum is σ = 316681665030186. Its totient is φ = 105560555010060.

The previous prime is 211121110020109. The next prime is 211121110020127. The reversal of 211121110020122 is 221020011121112.

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., 163599678590881 + 47521431429241 = 12790609^2 + 6893579^2 .

It is a super-2 number, since 2×211121110020122² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211121110020122.

It is not an unprimeable number, because it can be changed into a prime (211121110020127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52780277505029 + ... + 52780277505032.

Almost surely, 2^{211121110020122} is an apocalyptic number.

211121110020122 is a deficient number, since it is larger than the sum of its proper divisors (105560555010064).

211121110020122 is a wasteful number, since it uses less digits than its factorization.

211121110020122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105560555010063.

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

Adding to 211121110020122 its reverse (221020011121112), we get a palindrome (432141121141234).

The spelling of 211121110020122 in words is "two hundred eleven trillion, one hundred twenty-one billion, one hundred ten million, twenty thousand, one hundred twenty-two".