1212202101021 has 16 divisors (see below), whose sum is σ = 1672047687360. Its totient is φ = 780247117440.

The previous prime is 1212202100971. The next prime is 1212202101041. The reversal of 1212202101021 is 1201012022121.

It is not a de Polignac number, because 1212202101021 - 2⁹ = 1212202100509 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212202101041) 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, 3494766 + ... + 3825936.

It is an arithmetic number, because the mean of its divisors is an integer number (104502980460).

Almost surely, 2^{1212202101021} is an apocalyptic number.

It is an amenable number.

1212202101021 is a deficient number, since it is larger than the sum of its proper divisors (459845586339).

1212202101021 is a wasteful number, since it uses less digits than its factorization.

1212202101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373276.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1212202101021 its reverse (1201012022121), we get a palindrome (2413214123142).

The spelling of 1212202101021 in words is "one trillion, two hundred twelve billion, two hundred two million, one hundred one thousand, twenty-one".