20211222212010 has 128 divisors (see below), whose sum is σ = 54663845483520. Its totient is φ = 5313392064000.

The previous prime is 20211222212009. The next prime is 20211222212057. The reversal of 20211222212010 is 1021222211202.

It is a happy number.

20211222212010 is a `hidden beast` number, since 20 + 211 + 222 + 212 + 0 + 1 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4763455 + ... + 7944365.

It is an arithmetic number, because the mean of its divisors is an integer number (427061292840).

Almost surely, 2^{20211222212010} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20211222212010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27331922741760).

20211222212010 is an abundant number, since it is smaller than the sum of its proper divisors (34452623271510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20211222212010 is a wasteful number, since it uses less digits than its factorization.

20211222212010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3181261 (or 3181255 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20211222212010 its reverse (1021222211202), we get a palindrome (21232444423212).

The spelling of 20211222212010 in words is "twenty trillion, two hundred eleven billion, two hundred twenty-two million, two hundred twelve thousand, ten".