1202021100121 has 4 divisors (see below), whose sum is σ = 1202076293392. Its totient is φ = 1201965906852.

The previous prime is 1202021100101. The next prime is 1202021100127. The reversal of 1202021100121 is 1210011202021.

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 1202021100121 - 2⁵ = 1202021100089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1202021100127) 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, 27563955 + ... + 27607528.

It is an arithmetic number, because the mean of its divisors is an integer number (300519073348).

Almost surely, 2^{1202021100121} is an apocalyptic number.

It is an amenable number.

1202021100121 is a deficient number, since it is larger than the sum of its proper divisors (55193271).

1202021100121 is an equidigital number, since it uses as much as digits as its factorization.

1202021100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55193270.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1202021100121 its reverse (1210011202021), we get a palindrome (2412032302142).

The spelling of 1202021100121 in words is "one trillion, two hundred two billion, twenty-one million, one hundred thousand, one hundred twenty-one".