122220010001221 has 16 divisors (see below), whose sum is σ = 141174269013888. Its totient is φ = 104573008576000.

The previous prime is 122220010001209. The next prime is 122220010001227. The reversal of 122220010001221 is 122100010022221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 122220010001221 - 2⁷ = 122220010001093 is a prime.

It is a super-2 number, since 2×122220010001221² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 122220010001195 and 122220010001204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122220010001227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128374896 + ... + 129323446.

It is an arithmetic number, because the mean of its divisors is an integer number (8823391813368).

Almost surely, 2^{122220010001221} is an apocalyptic number.

122220010001221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122220010001221 is a deficient number, since it is larger than the sum of its proper divisors (18954259012667).

122220010001221 is a wasteful number, since it uses less digits than its factorization.

122220010001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1637612.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 122220010001221 its reverse (122100010022221), we get a palindrome (244320020023442).

The spelling of 122220010001221 in words is "one hundred twenty-two trillion, two hundred twenty billion, ten million, one thousand, two hundred twenty-one".