12121001022 has 16 divisors (see below), whose sum is σ = 26106771600. Its totient is φ = 3729538752.

The previous prime is 12121001017. The next prime is 12121001027. The reversal of 12121001022 is 22010012121.

It is an interprime number because it is at equal distance from previous prime (12121001017) and next prime (12121001027).

It is a junction number, because it is equal to n+sod(n) for n = 12121000989 and 12121001007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121001027) 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, 77698647 + ... + 77698802.

It is an arithmetic number, because the mean of its divisors is an integer number (1631673225).

Almost surely, 2^12121001022 is an apocalyptic number.

12121001022 is an abundant number, since it is smaller than the sum of its proper divisors (13985770578).

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

12121001022 is a wasteful number, since it uses less digits than its factorization.

12121001022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155397467.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12121001022 its reverse (22010012121), we get a palindrome (34131013143).

The spelling of 12121001022 in words is "twelve billion, one hundred twenty-one million, one thousand, twenty-two".