211221211212022 has 16 divisors (see below), whose sum is σ = 345634942442832. Its totient is φ = 96009576685920.

The previous prime is 211221211211893. The next prime is 211221211212029. The reversal of 211221211212022 is 220212112122112.

It is a super-2 number, since 2×211221211212022² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 211221211211984 and 211221211212002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211221211212029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48426628 + ... + 52607800.

It is an arithmetic number, because the mean of its divisors is an integer number (21602183902677).

Almost surely, 2^{211221211212022} is an apocalyptic number.

211221211212022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

211221211212022 is a deficient number, since it is larger than the sum of its proper divisors (134413731230810).

211221211212022 is a wasteful number, since it uses less digits than its factorization.

211221211212022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6477423.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 211221211212022 its reverse (220212112122112), we get a palindrome (431433323334134).

The spelling of 211221211212022 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred eleven million, two hundred twelve thousand, twenty-two".