1212102002021 has 16 divisors (see below), whose sum is σ = 1228511164608. Its totient is φ = 1195784304000.

The previous prime is 1212102001997. The next prime is 1212102002029. The reversal of 1212102002021 is 1202002012121.

It is a cyclic number.

It is not a de Polignac number, because 1212102002021 - 2¹⁰ = 1212102000997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212102001987 and 1212102002005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212102002029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51963041 + ... + 51986361.

It is an arithmetic number, because the mean of its divisors is an integer number (76781947788).

Almost surely, 2^{1212102002021} is an apocalyptic number.

It is an amenable number.

1212102002021 is a deficient number, since it is larger than the sum of its proper divisors (16409162587).

1212102002021 is a wasteful number, since it uses less digits than its factorization.

1212102002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25252.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1212102002021 its reverse (1202002012121), we get a palindrome (2414104014142).

The spelling of 1212102002021 in words is "one trillion, two hundred twelve billion, one hundred two million, two thousand, twenty-one".