1211203102021 has 8 divisors (see below), whose sum is σ = 1334394777888. Its totient is φ = 1090191810000.

The previous prime is 1211203102007. The next prime is 1211203102027. The reversal of 1211203102021 is 1202013021121.

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 1211203102021 - 2³¹ = 1209055618373 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211203101986 and 1211203102004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211203102027) 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, 545094795 + ... + 545097016.

It is an arithmetic number, because the mean of its divisors is an integer number (166799347236).

Almost surely, 2^{1211203102021} is an apocalyptic number.

1211203102021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1211203102021 is a deficient number, since it is larger than the sum of its proper divisors (123191675867).

1211203102021 is a wasteful number, since it uses less digits than its factorization.

1211203102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090191923.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1211203102021 its reverse (1202013021121), we get a palindrome (2413216123142).

The spelling of 1211203102021 in words is "one trillion, two hundred eleven billion, two hundred three million, one hundred two thousand, twenty-one".