1212122121001 has 4 divisors (see below), whose sum is σ = 1322315041104. Its totient is φ = 1101929200900.

The previous prime is 1212122120999. The next prime is 1212122121013. The reversal of 1212122121001 is 1001212212121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1212122121001 - 2¹ = 1212122120999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212122121401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55096460035 + ... + 55096460056.

It is an arithmetic number, because the mean of its divisors is an integer number (330578760276).

Almost surely, 2^{1212122121001} is an apocalyptic number.

1212122121001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1212122121001 is a deficient number, since it is larger than the sum of its proper divisors (110192920103).

1212122121001 is a wasteful number, since it uses less digits than its factorization.

1212122121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110192920102.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1212122121001 its reverse (1001212212121), we get a palindrome (2213334333122).

It can be divided in two parts, 12121 and 22121001, that added together give a palindrome (22133122).

The spelling of 1212122121001 in words is "one trillion, two hundred twelve billion, one hundred twenty-two million, one hundred twenty-one thousand, one".