21121222010122 has 16 divisors (see below), whose sum is σ = 35219506678272. Its totient is φ = 9433796430960.

The previous prime is 21121222010113. The next prime is 21121222010131. The reversal of 21121222010122 is 22101022212112.

It is an interprime number because it is at equal distance from previous prime (21121222010113) and next prime (21121222010131).

It is a super-2 number, since 2×21121222010122² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21121222010122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13102494238 + ... + 13102495849.

It is an arithmetic number, because the mean of its divisors is an integer number (2201219167392).

Almost surely, 2^{21121222010122} is an apocalyptic number.

21121222010122 is a deficient number, since it is larger than the sum of its proper divisors (14098284668150).

21121222010122 is a wasteful number, since it uses less digits than its factorization.

21121222010122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26204990133.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21121222010122 its reverse (22101022212112), we get a palindrome (43222244222234).

The spelling of 21121222010122 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred twenty-two million, ten thousand, one hundred twenty-two".