1210121222101 has 4 divisors (see below), whose sum is σ = 1320132242304. Its totient is φ = 1100110201900.

The previous prime is 1210121222099. The next prime is 1210121222113. The reversal of 1210121222101 is 1012221210121.

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 a cyclic number.

It is not a de Polignac number, because 1210121222101 - 2¹ = 1210121222099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210121222161) 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, 55005510085 + ... + 55005510106.

It is an arithmetic number, because the mean of its divisors is an integer number (330033060576).

Almost surely, 2^{1210121222101} is an apocalyptic number.

1210121222101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1210121222101 is a deficient number, since it is larger than the sum of its proper divisors (110011020203).

1210121222101 is a wasteful number, since it uses less digits than its factorization.

1210121222101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110011020202.

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

Adding to 1210121222101 its reverse (1012221210121), we get a palindrome (2222342432222).

The spelling of 1210121222101 in words is "one trillion, two hundred ten billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred one".