10001221212122 has 16 divisors (see below), whose sum is σ = 17145095722560. Its totient is φ = 4286201394048.

The previous prime is 10001221212053. The next prime is 10001221212133. The reversal of 10001221212122 is 22121212210001.

It is a self number, because there is not a number n which added to its sum of digits gives 10001221212122.

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, 1273847 + ... + 4650282.

It is an arithmetic number, because the mean of its divisors is an integer number (1071568482660).

Almost surely, 2^{10001221212122} is an apocalyptic number.

10001221212122 is a deficient number, since it is larger than the sum of its proper divisors (7143874510438).

10001221212122 is a wasteful number, since it uses less digits than its factorization.

10001221212122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6044725.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 10001221212122 its reverse (22121212210001), we get a palindrome (32122433422123).

It can be divided in two parts, 10001 and 221212122, that multiplied together give a palindrome (2212342432122).

The spelling of 10001221212122 in words is "ten trillion, one billion, two hundred twenty-one million, two hundred twelve thousand, one hundred twenty-two".