21220121220122 has 32 divisors (see below), whose sum is σ = 35340269207040. Its totient is φ = 9475079874480.

The previous prime is 21220121220113. The next prime is 21220121220131. The reversal of 21220121220122 is 22102212102212.

It is an interprime number because it is at equal distance from previous prime (21220121220113) and next prime (21220121220131).

It is a junction number, because it is equal to n+sod(n) for n = 21220121220094 and 21220121220103.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19521368 + ... + 20579699.

It is an arithmetic number, because the mean of its divisors is an integer number (1104383412720).

Almost surely, 2^{21220121220122} is an apocalyptic number.

21220121220122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21220121220122 is a deficient number, since it is larger than the sum of its proper divisors (14120147986918).

21220121220122 is a wasteful number, since it uses less digits than its factorization.

21220121220122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40101506.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21220121220122 its reverse (22102212102212), we get a palindrome (43322333322334).

The spelling of 21220121220122 in words is "twenty-one trillion, two hundred twenty billion, one hundred twenty-one million, two hundred twenty thousand, one hundred twenty-two".