1202221020121 has 4 divisors (see below), whose sum is σ = 1311513840144. Its totient is φ = 1092928200100.

The previous prime is 1202221020113. The next prime is 1202221020137. The reversal of 1202221020121 is 1210201222021.

It is a happy number.

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 1202221020121 - 2³ = 1202221020113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1202221020095 and 1202221020104.

It is not an unprimeable number, because it can be changed into a prime (1202221020421) 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, 54646409995 + ... + 54646410016.

It is an arithmetic number, because the mean of its divisors is an integer number (327878460036).

Almost surely, 2^{1202221020121} is an apocalyptic number.

1202221020121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1202221020121 is a deficient number, since it is larger than the sum of its proper divisors (109292820023).

1202221020121 is a wasteful number, since it uses less digits than its factorization.

1202221020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109292820022.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1202221020121 its reverse (1210201222021), we get a palindrome (2412422242142).

The spelling of 1202221020121 in words is "one trillion, two hundred two billion, two hundred twenty-one million, twenty thousand, one hundred twenty-one".