20221221210212 has 48 divisors (see below), whose sum is σ = 38631762618624. Its totient is φ = 9184891716000.

The previous prime is 20221221210167. The next prime is 20221221210257. The reversal of 20221221210212 is 21201212212202.

It is an interprime number because it is at equal distance from previous prime (20221221210167) and next prime (20221221210257).

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, 455708387 + ... + 455752757.

It is an arithmetic number, because the mean of its divisors is an integer number (804828387888).

Almost surely, 2^{20221221210212} is an apocalyptic number.

20221221210212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20221221210212 is a deficient number, since it is larger than the sum of its proper divisors (18410541408412).

20221221210212 is a wasteful number, since it uses less digits than its factorization.

20221221210212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51560 (or 51558 counting only the distinct ones).

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

Adding to 20221221210212 its reverse (21201212212202), we get a palindrome (41422433422414).

The spelling of 20221221210212 in words is "twenty trillion, two hundred twenty-one billion, two hundred twenty-one million, two hundred ten thousand, two hundred twelve".