20101222212210 has 48 divisors (see below), whose sum is σ = 52583810782464. Its totient is φ = 5327440484256.

The previous prime is 20101222212209. The next prime is 20101222212241. The reversal of 20101222212210 is 1221222210102.

It is a happy number.

20101222212210 is a `hidden beast` number, since 20 + 1 + 0 + 1 + 222 + 212 + 210 = 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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 685098562 + ... + 685127901.

It is an arithmetic number, because the mean of its divisors is an integer number (1095496057968).

Almost surely, 2^{20101222212210} is an apocalyptic number.

20101222212210 is an abundant number, since it is smaller than the sum of its proper divisors (32482588570254).

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

20101222212210 is a wasteful number, since it uses less digits than its factorization.

20101222212210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1370226639 (or 1370226636 counting only the distinct ones).

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

Adding to 20101222212210 its reverse (1221222210102), we get a palindrome (21322444422312).

The spelling of 20101222212210 in words is "twenty trillion, one hundred one billion, two hundred twenty-two million, two hundred twelve thousand, two hundred ten".