21220021222202 has 32 divisors (see below), whose sum is σ = 34767745369920. Its totient is φ = 9633222753280.

The previous prime is 21220021222187. The next prime is 21220021222217. The reversal of 21220021222202 is 20222212002212.

It is an interprime number because it is at equal distance from previous prime (21220021222187) and next prime (21220021222217).

It is a super-3 number, since 3×21220021222202³ (a number of 41 digits) contains 333 as substring.

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, 497202488 + ... + 497245164.

It is an arithmetic number, because the mean of its divisors is an integer number (1086492042810).

Almost surely, 2^{21220021222202} is an apocalyptic number.

21220021222202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21220021222202 is a deficient number, since it is larger than the sum of its proper divisors (13547724147718).

21220021222202 is a wasteful number, since it uses less digits than its factorization.

21220021222202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70846.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 21220021222202 its reverse (20222212002212), we get a palindrome (41442233224414).

The spelling of 21220021222202 in words is "twenty-one trillion, two hundred twenty billion, twenty-one million, two hundred twenty-two thousand, two hundred two".