21221121120122 has 96 divisors (see below), whose sum is σ = 40930716258432. Its totient is φ = 8072951040000.

The previous prime is 21221121120037. The next prime is 21221121120139. The reversal of 21221121120122 is 22102112112212.

It is a junction number, because it is equal to n+sod(n) for n = 21221121120094 and 21221121120103.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 221464622 + ... + 221560422.

It is an arithmetic number, because the mean of its divisors is an integer number (426361627692).

Almost surely, 2^{21221121120122} is an apocalyptic number.

21221121120122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21221121120122 is a deficient number, since it is larger than the sum of its proper divisors (19709595138310).

21221121120122 is a wasteful number, since it uses less digits than its factorization.

21221121120122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98916 (or 98905 counting only the distinct ones).

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

Adding to 21221121120122 its reverse (22102112112212), we get a palindrome (43323233232334).

The spelling of 21221121120122 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred twenty-one million, one hundred twenty thousand, one hundred twenty-two".