21003120123122 has 16 divisors (see below), whose sum is σ = 31722222430080. Its totient is φ = 10429160628768.

The previous prime is 21003120123107. The next prime is 21003120123131. The reversal of 21003120123122 is 22132102130012.

It is a super-2 number, since 2×21003120123122² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21003120123094 and 21003120123103.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28295222 + ... + 29028017.

It is an arithmetic number, because the mean of its divisors is an integer number (1982638901880).

Almost surely, 2^{21003120123122} is an apocalyptic number.

21003120123122 is a deficient number, since it is larger than the sum of its proper divisors (10719102306958).

21003120123122 is a wasteful number, since it uses less digits than its factorization.

21003120123122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57324505.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21003120123122 its reverse (22132102130012), we get a palindrome (43135222253134).

The spelling of 21003120123122 in words is "twenty-one trillion, three billion, one hundred twenty million, one hundred twenty-three thousand, one hundred twenty-two".