1212530363021 has 4 divisors (see below), whose sum is σ = 1216479973632. Its totient is φ = 1208580752412.

The previous prime is 1212530363003. The next prime is 1212530363047. The reversal of 1212530363021 is 1203630352121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1212530363021 - 2⁶ = 1212530362957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212530363081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1974804845 + ... + 1974805458.

It is an arithmetic number, because the mean of its divisors is an integer number (304119993408).

Almost surely, 2^{1212530363021} is an apocalyptic number.

It is an amenable number.

1212530363021 is a deficient number, since it is larger than the sum of its proper divisors (3949610611).

1212530363021 is an equidigital number, since it uses as much as digits as its factorization.

1212530363021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3949610610.

The product of its (nonzero) digits is 6480, while the sum is 29.

The spelling of 1212530363021 in words is "one trillion, two hundred twelve billion, five hundred thirty million, three hundred sixty-three thousand, twenty-one".