1212210202021 has 16 divisors (see below), whose sum is σ = 1491976886400. Its totient is φ = 959094739008.

The previous prime is 1212210202013. The next prime is 1212210202051. The reversal of 1212210202021 is 1202020122121.

It is a happy number.

It is not a de Polignac number, because 1212210202021 - 2³ = 1212210202013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1212210201986 and 1212210202004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212210202001) 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, 10090335 + ... + 10209763.

It is an arithmetic number, because the mean of its divisors is an integer number (93248555400).

Almost surely, 2^{1212210202021} is an apocalyptic number.

It is an amenable number.

1212210202021 is a deficient number, since it is larger than the sum of its proper divisors (279766684379).

1212210202021 is a wasteful number, since it uses less digits than its factorization.

1212210202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230988.

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

Adding to 1212210202021 its reverse (1202020122121), we get a palindrome (2414230324142).

The spelling of 1212210202021 in words is "one trillion, two hundred twelve billion, two hundred ten million, two hundred two thousand, twenty-one".