1121212202021 has 8 divisors (see below), whose sum is σ = 1129227722304. Its totient is φ = 1113204448800.

The previous prime is 1121212201981. The next prime is 1121212202059. The reversal of 1121212202021 is 1202022121211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1121212202021 - 2¹⁸ = 1121211939877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121212202821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1651871 + ... + 2229596.

It is an arithmetic number, because the mean of its divisors is an integer number (141153465288).

Almost surely, 2^{1121212202021} is an apocalyptic number.

It is an amenable number.

1121212202021 is a deficient number, since it is larger than the sum of its proper divisors (8015520283).

1121212202021 is a wasteful number, since it uses less digits than its factorization.

1121212202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3883531.

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

Adding to 1121212202021 its reverse (1202022121211), we get a palindrome (2323234323232).

The spelling of 1121212202021 in words is "one trillion, one hundred twenty-one billion, two hundred twelve million, two hundred two thousand, twenty-one".